I've never been to a gay club, even though i'm bisexual
anyway, if you wanna go clubbing, i can only talk about straight clubs. Trafalgar Square is pretty good, as is the West End, there's lots of places to drink/club there. Not sure how gay friendly they are though. Like, they wouldn't deny you entry for being gay, but if y'all started making out and stuff i'm not sure how people would react, depends if there's drunk troublemakers out. Camden is good if you like live music. Brick Lane is also really good but idk if i'd reccomend you to go there at night seeing as it's kinda dangerous at times. I'd stay stick to Central London and the touristy, well lit areas if you're a tourist. Don't stray into the suburbs etc.