Most of the good ones have been said, Joshua Brooks (good small venue), Sound Control, Gorilla, Sankeys
Venus polarises my opinion a bit, they are beyond picky on the door, about 10 different questions, often if they dont like the look of you its just a straight "no", same with Sankeys though they have become a bit more lenient recently.
I know sankeys did an event down in London a few months ago, they got absolutely berated (by some) on facebook after the venue, they took some of their "door pickers" down with them to london and you can imagine how that went. basically if you look rough or like you might cause trouble you get sent packing, even if you have bought a ticket. I have seen groups of about 15+ who have come from afar etc with tickets all to get turned away a the door for wearing smart shoes.
Avicii White if your into a posh "clubbing experience" rammed with the VIP cunto type and the decor to match, often has a few. Its mostly house music, cant fault them just seems they are trying to push for the "VIP experience" bleh went once and probaly never again.
Trying to think of a few not mentioned
The Roadhouse in the northern quarter sometimes has some good events with a good crowd
(actually fucking loads when you think about it plus all the ones mentioned, the majefa trance nights are quality, albert hall another new venue mentioned)
Selective Hearing often have some good events on a different places, like, been to a good bring your own booze types and at other places... Also Soup Kitchen ! another small venue with some good events.. usually small venue is cheap and brings a good crowd, depends what your after though.
I actaully think theres a thread somewhere similar to this hidden in the depths with exactly the same posters and responses but hey ho
I actually saw some older looking men (30+) in tight pants and lumberjack shirts getting turned down from 5th ave poor men, looked heart broken, probably for the best anyway. I am sure 42s would have taken them in with open arms.