The last site of this nature I had anything to do with was Tribe - and not very much even there. There was a male Belly Dancer's group there that was active for awhile. MySpace and facebook were OBVIOUSLY oriented towards teens, and the rest of it has just gone down hill from there. About the only ones that make any sense whatsoever are LinkedIn and maybe Pinterest, but I've never felt the need to join even those. I messed around a bit with geocities back in the day.
I stick to discussion forums, which are the WWW version of the old dialup BBS systems. I belong to several firearms forums (fora?), the only remaining Belly Dance forum (that's on life support), a couple of piano forums that I haven't visited in years because of their Liberal slant, a couple of really nice antique sewing machine forums, and some forum about little red vehicles that can go just about anywhere...
I've been on a few others that I just lost interest in, a brand specific motorhome forum when I was thinking about one of their motorhomes, etc. But nothing - and I mean NOTHING - beats a piano forum for flamewars!
I’ve pretty much done the same thing.
But you need to tell us more about belly dancing. I’m intrigued! Never heard of male belly dancers.