Berghain

Berlin's hedonistic club capital
Word to the wise: Any kind of photographic equipment, including phones, is strictly forbidden.

Berghain is the monster of all Berlin nightclubs. Named for its location between Kreuzberg and Friedrichshain, it's housed in a former power plant, but they forgot to redecorate it, so expect to pump away to three floors of techno, whilst hugging concrete pillars and getting covered in brick dust.
The club has a colourful reputation, so you might expect all sorts to be going on here, from live sex shows in the infamous 'dark rooms', to devil worship in the basement. But in truth, it's just 1,500 people tanked up on Red Bull, dancing like headless chickens. Fantastic, and harmless fun.