Waxworks? That's a name I've seen around from time to time when I've been there. I wouldn't say they're "active", at last check, though I may be wrong... I admittedly haven't checked there in-depth in some time.
I'm also a member of the Friendship is Magic RPG site earlier referenced by Solana. Admittedly... the place doesn't have nearly as many active members, and it's actually part of the reason I'm here as well.