Unskinny Bop at what was once the Pleasure Unit in Bethnal Green (now the Star of Bethnal Green) used to be cool. We went last month and the music was shit, the crowd was so packed in you could barely lift a drink to your mouth, let alone dance, and the noise of all of it was so much that you couldn't talk either.
So you paid (theoretically) to get in and stand in a noisy room, not drinking, dancing or talking to people. Like the tube at rush hour, but with more drunks.
Still, it was good once.
It's not age, either - I was already old when I started going there.