Renowned for its selective bouncers, hedonistic parties, hypnotic DJ sets and strict no-photo policy, Berlin's iconic techno haven, Berghain, remains one of the world’s most talked-about nightclubs.

Entering the next room you are met by dozens of people stripping off. It turns out the backpacks were stuffed with alternative outfits. People have queue attire and Berghain attire, and ...