I was able to hide members in a social group by replacing the social_group template with the following on VB3.8.3
$stylevar[htmldoctype]
<html xmlns="http://www.w3.org/1999/xhtml" dir="$stylevar[textdirection]" lang="$stylevar[languagecode]">
<head>
$headinclude
<title>$vboptions[bbtitle] - $custompagetitle</title>
$socialgroups_css
</head>
<body>
$header
$navbar
<if condition="$show['groupinfo']">
<div class="social_group tborder content_block">
<div class="tcat block_title">
<if condition="$groupoptions['join'] OR $groupoptions['leave']">
<span class="smallfont" style="float:$stylevar[right]">
<if condition="$groupoptions['join']">
<a href="group.php?$session[sessionurl]do=join&groupid=$group[groupid]">$vbphrase[join_group]</a>
<else />
<if condition="!$group['membertype'] AND $group['type'] == 'inviteonly'">
$vbphrase[group_type_inviteonly]
</if>
</if>
<if condition="$groupoptions['join'] AND $groupoptions['leave']">
|
</if>
<if condition="$groupoptions['leave']"><a href="group.php?$session[sessionurl]do=leave&groupid=$group[groupid]">$groupoptions[leavephrase]</a></if>
</span>
</if>
<if condition="$group[membermoderated]">$vbphrase[moderated_social_group]<else />$vbphrase[social_group]</if>
</div>
<!-- group info -->
<div class="alt1 block_row">
<if condition="$groupiconurl">
<img src="$groupiconurl" alt="" style="float:$stylevar[right]" class="sgicon" />
</if>
<h1 id="group_name"></h1>
<div id="group_creator" class="smallfont"><phrase 1="$ownerlink" 2="$group[creatorusername]">$vbphrase[group_maintained_by_x]</phrase></div>
<if condition="$group['description']">
<p id="group_description">$group[description]</p>
</if>
</div>
<!-- members -->
<if condition="$show['pictures_block']">
<div class="thead block_row">
<a id="view_all_members_link" class="smallfont" href="group.php?$session[sessionurl]do=viewmembers&groupid=$group[groupid]">$vbphrase[view_all_members]</a>
<phrase 1="$members_shown" 2="$group[members]">$vbphrase[showing_x_of_y_members]</phrase>
</div>
<div class="alt2 block_row">
<ul id="group_member_list">$short_member_list_bits</ul>
</div></if>
<!-- pictures -->
<if condition="$show['pictures_block']">
<div class="thead block_row">
<div id="picture_links" class="smallfont">
<a href="group.php?$session[sessionurl]do=grouppictures&groupid=$group[groupid]">$vbphrase[view_pictures]</a>
<if condition="$show['add_pictures_link']">| <a href="group.php?$session[sessionurl]do=addpictures&groupid=$group[groupid]">$vbphrase[add_pictures]</a></if>
</div>
<if condition="$pictures_shown">
<phrase 1="$pictures_shown" 2="$group[picturecount]">$vbphrase[showing_x_of_y_pictures]</phrase>
<else />
$vbphrase[group_pictures]
</if>
</div>
<div class="alt1 block_row">
<if condition="$picturebits">
$picturebits
<else />
$vbphrase[no_pictures_added_group_yet]
<if condition="$show['add_pictures_link']"><a href="group.php?$session[sessionurl]do=addpictures&groupid=$group[groupid]">$vbphrase[add_pictures_to_this_group]</a></if>
</if>
</div>
</if>
$socialgroups_events
</div><br />
</if>
<!-- Discussions -->
<if condition="$show['groupdiscussions']">
<script type="text/javascript" src="clientscript/vbulletin_group_read_marker.js?v=$vboptions[simpleversion]"></script>
<table class="tborder" cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" border="0" width="100%" style="border-bottom-width:0px">
<tr>
<td class="tcat" width="100%" colspan="3">
<if condition="$messagebits OR $searchtext">
<div style="float:$stylevar[right]" class="normal">
<form action="group.php" method="post">
$vbphrase[search_discussions]
<input type="text" class="bginput" name="searchtext" value="$searchtext" style="font-size: 11px;" /> <input type="submit" class="button" value="$vbphrase[go]" />
<input type="hidden" name="s" value="$session[sessionhash]" />
<input type="hidden" name="securitytoken" value="$bbuserinfo[securitytoken]" />
<input type="hidden" name="groupid" value="$group[groupid]" />
<input type="hidden" name="perpage" value="$perpage" />
</form>
</div>
</if>
<if condition="!$show['groupinfo']">
<phrase 1="$group[name]">$vbphrase[social_group_discussions_in_x]</phrase>
<else />
$vbphrase[social_group_discussions]
</if>
</td>
<td class="vbmenu_control" id="grouptools" nowrap="nowrap"><a href="$show[nojs_link]#goto_grouptools" rel="nofollow">$vbphrase[group_tools]</a> <script type="text/javascript"> vbmenu_register("grouptools"); </script></td>
</tr>
</table>
<if condition="$messagebits">
<if condition="$show['inlinemod']">
<form action="group_inlinemod.php?groupid=$group[groupid]" method="post" id="group_discussion_inlinemod_form">
</if>
<table class="tborder discussion_list" id="discussion_list" cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" border="0" width="100%">
<tr class="block_title">
$template_hook[group_discussionlist_start_col]
<td class="thead" width="100%">
<if condition="$messagetotal">
<span style="float:$stylevar[right]"><a href="$orderlinks[dateline]&pp=$perpage&page=$pagenumber">$vbphrase[group_created] $sortarrow[dateline]</a></span>
<if condition="$messagestart > 1">
<phrase 1="$messagestart" 2="$messageend" 3="$messagetotal">$vbphrase[showing_discussions_x_to_y_of_z]</phrase>
<else />
<phrase 1="$messageshown" 2="$messagetotal">$vbphrase[showing_discussions_x_of_y]</phrase>
</if>
</if>
</td>
<td class="thead" align="center" nowrap="nowrap">
<a href="$orderlinks[replies]&pp=$perpage&page=$pagenumber">$vbphrase[replies]</a> $sortarrow[replies]
</td>
<td class="thead" align="center" nowrap="nowrap">
<a href="$orderlinks[lastpost]&pp=$perpage&page=$pagenumber">$vbphrase[last_post]</a> $sortarrow[lastpost]
</td>
<if condition="$show['inlinemod']">
<td class="thead" align="center" nowrap="nowrap">
<a id="discussion_inlinemodsel"></a>
</td>
</if>
$template_hook[group_discussionlist_end_col]
</tr>
$messagebits
</table>
<if condition="$show['inlinemod'] OR $pagenav OR $show['postlink']">
<div class="floatcontainer">
<if condition="$pagenav">
<div id="discussion_pagenav">
$pagenav
</div>
</if>
<if condition="$show['inlinemod']">
<div id="discussion_moderation">
<div class="smallfont push_down"><label for="moderation_select_comments"><strong>$vbphrase[moderation]</strong></label></div>
<select id="moderation_select_comments" name="do">
<if condition="$show['delete'] OR $show['undelete'] OR $show['approve']">
<optgroup label="$vbphrase[option]" id="moderation_select_comments_optgroup">
<if condition="$show['delete']">
<option value="inlinedelete" id="inlinemod_comment_controls_delete">$vbphrase[delete_discussions]</option>
</if>
<if condition="$show['undelete']">
<option value="inlineundelete" id="inlinemod_comment_controls_undelete">$vbphrase[undelete_discussions]</option>
</if>
<if condition="$show['approve']">
<option value="inlineapprove" id="inlinemod_comment_controls_approve">$vbphrase[approve_discussions]</option>
<option value="inlineunapprove" id="inlinemod_comment_controls_unapprove">$vbphrase[unapprove_discussions]</option>
</if>
</optgroup>
</if>
<optgroup label="____________________">
<option value="clearmessage">$vbphrase[deselect_all_discussions]</option>
</optgroup>
</select>
<input type="submit" value="$vbphrase[go]" id="gdiscussion_inlinego" class="button" />
<input type="hidden" name="s" value="$session[sessionhash]" />
<input type="hidden" name="securitytoken" value="$bbuserinfo[securitytoken]" />
</div>
</if>
<if condition="$show['postlink']"><div class="action_links"><a href="group.php?$session[sessionurl]do=message&groupid=$group[groupid]" rel="nofollow">$vbphrase[new_discussion]</a></div></if>
</div>
</if>
<if condition="$show['inlinemod']">
<if condition="$show[popups]">
<script type="text/javascript" src="clientscript/vbulletin_inlinemod.js?v=$vboptions[simpleversion]"></script>
<script type="text/javascript">
<!--
inlineMod_comment = new vB_Inline_Mod('inlineMod_comment', 'gdiscussion', 'group_discussion_inlinemod_form', '$vbphrase[go_x]', 'vbulletin_inline', 'thread');
vBmenu.register("discussion_inlinemodsel");
//-->
</script>
<!-- inline mod selection popup -->
<ul id="discussion_inlinemodsel_menu" class="vbmenu_popup list_no_decoration" style="display:none">
<li class="thead first">$vbphrase[from_this_page]</li>
<li class="vbmenu_option" onclick="inlineMod_comment.check_all(true)">$vbphrase[select_all]</li>
<li class="vbmenu_option" onclick="inlineMod_comment.check_all(false)">$vbphrase[deselect_all]</li>
<li class="vbmenu_option" onclick="inlineMod_comment.check_all('invert')">$vbphrase[invert_selection]</li>
<li class="thead"><img src="$vboptions[cleargifurl]" alt="" width="1" height="1" /></li>
<li class="vbmenu_option" onclick="inlineMod_comment.check_all(true, 1)">$vbphrase[select_unapproved_posts]</li>
<li class="vbmenu_option" onclick="inlineMod_comment.check_all(true, 2)">$vbphrase[select_deleted_posts]</li>
</ul>
<!-- / inline mod selection popup -->
</if>
<input type="hidden" name="inline_discussion" value="1" />
</form>
<!-- / inline moderation form -->
</if>
<else />
<div class="tborder social_group">
<div class="alt2 block_row">
<if condition="$searchtext">
$vbphrase[no_discussions_found]
<else />
$vbphrase[group_has_no_discussions]
</if>
</div>
</div>
<if condition="$show['postlink']"><div class="action_links"><a href="group.php?$session[sessionurl]do=message&groupid=$group[groupid]" rel="nofollow">$vbphrase[new_discussion]</a></div></if>
</if>
<if condition="$show[popups]">
<!-- group tools popup -->
<ul id="grouptools_menu" class="vbmenu_popup list_no_decoration" style="display:none">
<li class="thead first">$vbphrase[group_tools]</li>
<li class="vbmenu_option"><a href="#" rel="nofollow" onclick="return mark_group_read($group[groupid]);">$vbphrase[mark_this_group_read]</a></li>
<if condition="$show[subscribe]">
<if condition="!$group[subscribed]">
<li class="vbmenu_option"><a href="group.php?$session[sessionurl]do=subscribe&groupid=$group[groupid]" rel="nofollow">$vbphrase[subscribe_to_this_group]</a></li>
<else />
<li class="vbmenu_option"><a href="group.php?$session[sessionurl]do=unsubscribe&groupid=$group[groupid]" rel="nofollow">$vbphrase[unsubscribe_from_this_group]</a></li>
</if>
</if>
</ul>
<!-- / group tools popup -->
<else />
<!-- group tools -->
<br />
<div class="tborder social_group smallfont">
<a name="goto_grouptools"></a>
<div class="thead">$vbphrase[group_tools]</div>
<div class="alt1 block_row">
<img class="inlineimg" src="$stylevar[imgdir_button]/subscribe.gif" alt="$vbphrase[mark_this_group_read]" vspace="1" /> <a href="group.php?$session[sessionurl]do=markread&groupid=$group[groupid]" rel="nofollow">$vbphrase[mark_this_group_read]</a>
</div>
<if condition="$show[subscribe]">
<if condition="!$group[subscribed]">
<div class="alt2 block_row"><img class="inlineimg" src="$stylevar[imgdir_button]/subscribe.gif" alt="$vbphrase[subscribe_to_this_group]" vspace="1" /> <a href="group.php?$session[sessionurl]do=subscribe&groupid=$group[groupid]" rel="nofollow">$vbphrase[subscribe_to_this_group]</a></div>
<else />
<div class="alt2 block_row"><img class="inlineimg" src="$stylevar[imgdir_button]/subscribe.gif" alt="$vbphrase[unsubscribe_from_this_group]" vspace="1" /> <a href="group.php?$session[sessionurl]do=unsubscribe&groupid=$group[groupid]" rel="nofollow">$vbphrase[unsubscribe_from_this_group]</a></div>
</if>
</if>
</div>
</if>
<!-- / group tools -->
</if>
<if condition="!$group['canviewcontent']">
<div id="join_to_view" class="tborder social_group">
<div class="alt2 block_row">
$vbphrase[must_join_to_view]
</div>
</div>
</if>
<if condition="$show['groupoptions']">
<br />
<div id="discussion_foot" class="social_group tborder content_block">
<div class="tfoot block_title">
<ul id="group_footer_links">
<if condition="$groupoptions['join']">
<li class="smallfont">
<a href="group.php?$session[sessionurl]do=join&groupid=$group[groupid]">$vbphrase[join_group]</a>
</li>
<else />
<if condition="$group['membertype'] != 'member' AND $group['type'] == 'inviteonly'">
<li class="smallfont">
$vbphrase[group_type_inviteonly]
</li>
</if>
</if>
<if condition="$groupoptions['leave']"><li class="smallfont"><a href="group.php?$session[sessionurl]do=leave&groupid=$group[groupid]">$groupoptions[leavephrase]</a></li></if>
<if condition="$groupoptions['edit']"><li class="smallfont"><a href="group.php?$session[sessionurl]do=edit&groupid=$group[groupid]">$vbphrase[edit_group]</a></li></if>
<if condition="$groupoptions['delete']"><li class="smallfont"><a href="group.php?$session[sessionurl]do=delete&groupid=$group[groupid]">$vbphrase[delete_group]</a></li></if>
<if condition="$groupoptions['manage']">
<li class="smallfont">
<a href="group.php?$session[sessionurl]do=manage&groupid=$group[groupid]">$vbphrase[pending_and_invited_members]</a>
</li>
</if>
<if condition="$groupoptions['managemembers']">
<li class="smallfont">
<a href="group.php?$session[sessionurl]do=managemembers&groupid=$group[groupid]">$vbphrase[manage_members]</a>
</li>
</if>
<if condition="$groupoptions['email_group']">
<li class="smallfont">
<a href="sendmessage.php?$session[sessionurl]do=groupemail&groupid=$group[groupid]">$vbphrase[email_members]</a>
</li>
</if>
<if condition="$groupoptions['transfergroup']">
<li class="smallfont">
<a href="group.php?$session[sessionurl]do=transfer&groupid=$group[groupid]">$vbphrase[transfer_group]</a>
</li>
</if>
</ul>
</div>
</div>
</if>
$footer
</body>
</html>
In socialgroups_grouplist_bit
Replace the content with the following
<tr>
<td class="alt1" width="100%" valign="top">
<if condition="$group[iconurl]">
<div class="sgicon" style="float:$stylevar[left];padding:2px 4px 2px 0">
<a href="group.php?$session[sessionurl]groupid=$group[groupid]">
<img class="sgicon" src="$group[iconurl]" alt="$group[shortdescription]" />
</a>
</div>
</if>
<if condition="$show[category_names]">
<span style="float:$stylevar[right]" class="smallfont"><a href="group.php?$session[sessionurl]do=grouplist&cat=$group[categoryid]" style="font-weight:normal">$group[categoryname]</a></span>
</if>
<div style="margin-bottom:$stylevar[cellpadding]px; margin-$stylevar[left]:$stylevar[cellspacing]px">
<a href="group.php?$session[sessionurl]groupid=$group[groupid]" <if condition="!$group['is_read']">class="unread"</if>>$group[name]</a>
</div>
<div>$group[mediumdescription]</div>
</td>
<td class="alt2" align="center">$group[members]</td>
<if condition="$show['gminfo']">
<td class="alt1" align="center">$group[discussions]</td>
<td class="alt2" align="center">$group[visible]</td>
</if>
<if condition="$show['pictureinfo']"><td class="alt1" align="center"><if condition="$group['picturecount']"><a href="group.php?$session[sessionurl]do=grouppictures&groupid=$group[groupid]">$group[picturecount]</a><else />$group[picturecount]</if></td></if>
<if condition="$show['gminfo']">
<td class="$lastpostalt smallfont" align="center" nowrap="nowrap">
<if condition="$show['lastpostinfo']">
<div style="text-align: center">
$group[lastpostdate]
<if condition="!$show['detailedtime']">
<br /><span class="time">$group[lastposttime]</span>
</if>
<br />by <a href="member.php?$session[sessionurl]u=$group[lastposterid]">$group[lastposter]</a> <a title="$vbphrase[go_to_last_post]" href="group.php?$session[sessionurl]do=discuss&gmid=$group[lastgmid]#gmessage$group[lastgmid]"><img class="inlineimg" src="$stylevar[imgdir_button]/lastpost.gif" border="0" /></a>
</div>
<else />
<div style="text-align: center">
$group[createdate]
</div>
</if>
</td>
</if>
</tr>