I don't know if there is a simple answer to this. A group of FP people would be fine to meet with, but I want to avoid the Haskell -vs- Scheme -vs- OCaml -vs- Lisp -vs- Erlang nonsense.
Erlang seems to have a groundswell, maybe it's the "gateway drug" to FP, but I'm more interested in its concurrency features.
Please consider joining as we figure this sort of stuff out.
(my .01 cents worth ;-))
-joe