The Fortress
Weird, tatty venue where anarchy seems to reign. If you walked past it you'd miss it as from the street this just looks like any other 4-floor Victorian terrace. There's no sign of any security and once inside you can just wander up onto the roof and climb the chimney stacks, or at least you could last time we were here. The unisex toilets are like the little cubicals you had at school. The main dancefloor is in the basement where it's actually pretty spacious.

The venue tends to host one-off events and raves, so check flyers and if you see an event at the Fortress give it a go.

34-38 Provost Street N1
Nearest Tube: Old Street