New Place for Dancers

I was walking down a street. All the buildings were close together and the street was very, very narrow. There were all these djs out playing and they each had one dancer with them. There was a very specific set up, and the street was labelled where everything went. Stereo here, railing there, dancer over there - in a very small, 3x4 space. I was watching one dj as he was setting up, but he was on someone else's territory. There was a black fire escape and the dancer was standing on it.