To me as well, I see the ability to run a server technically and the ability to manage a community as essentially orthogonal skills and in my case—larp communities—I have a large number of partially overlapping groups that are essentially transitory in nature and where there are goals other than "to socialize"
Do you set up a server for each one?
Do you have a larger server (or set of servers) and encourage forming subcommunities that may have different norms?