dance floor

How about a fully automated AI dance club that starts playing the germ of a beat, then, as people begin filling up the dance floor, the club somehow monitors the movement, faces, fashion, etc. of the dancers to feed back into and evolve the music and visualizers? Somehow. Next we'll have...

What song in your setlist goes over best live? The one that always gets them on the dance floor. (If you have multiples, which one gets the best reaction).