Break-dance Locations

I have begun looking into where break-dance and break-dance battles occur in Kreuzberg and the rest of the world. I want to understand the break-dance scene more so that I design a stage and performance float for the youth of Kreuzberg to practice and perform. Most of break-dancing happens on the street or in places like subways in which there isn't much of a stage it's just a piece of cardboard thrown on the ground (if that).