Two years ago the number of people outside Chicago who were familiar with the mutant juke offshoot known as footwork music could probably have fit comfortably on one Red Line car. Which makes it feel totally bizarre that there’s a group of DJs and producers named the Nightmare Juke Squad representing hard for footwork in Paris, France—or that the record label that’s pressed more footwork to vinyl than probably any other (including the thorough genre survey Bangs & Works Vol. 1) is London-based Planet Mu. It used to feel as if footwork, with its ridiculous tempos and spooky atmospherics, was too weird to ever go mainstream. But considering that dubstep is equally strange and has become a favorite among the Ed Hardy set, who knows where it might end up? —Miles Raymer