Picture by FuchsblogFunny, I passed by that scene on Kastanienallee yesterday as well but only managed to take a crappy picture with my mobile.
Fortunately, these guys documented it: A whole bunch of people sitting on the tramway rails, enjoying the mild night and occupying public space. Feels a little mediterranean, I must say..
By the way, the cool film festival crew SHORT SHOTS is looking for people to support them in Berlin and Madrid!

ERCO light design in Hong Kong
Photo by eanousa@Flickr
Picture by Republish.org
Deichkind Photo by Substrat@Flickr
Picture from Discogs