I once built a community on Facebook titled "\(n_n)/". The idea was to have thoughtful, philosophical discussions, but I didn't want to name it "Philosophy Group" or whatever because that sounded pretentious. We'd call ourselves "n_n'ers" or "nners"- which, of course, can't really be pronounced. In person, we'd say "I met her through 'N'."

I think this is one of those things where something will emerge out of necessity, and it'll just stick, and a bottom-up approach will probably be best. Let people figure out their own "desire paths" to what they want to be called. If communication is necessary, people will find a way.