Different forum for different cities

[hippyTRIBE]

Hello everyone,

I am confused as to how to achieve the following. kindly help this lost newbie.

i have a site with different city options: A,B,C,D. The forums (let's say) are 1,2,3,4,5.

City A requires all the forums but the content of the forum will be different,as in the forums wud be somethin like this: A1,A2, 3,4,5 (3,4,5 being the common forums while A1 and A2 are forums 1 and 2 with A's content). Similarly for city B, it requires 3,4,5 as common forums and B1 and B2. And so on.

When users click on a city button, it should lead to a forum page with the city-based forums and the common forums.

One option i was looking at was to create usergroups based on their cities and give forum permissions (this requires different names for all the forums). But this is a very complicated process or rather a foolish one.

I don't know where i am heading. Please help.