The exterior of the Richmond Theater where Ellen Aim sings at the beginning of the film was shot on the backlot, with the interior done in the Wiltern Theater in L.A. for two weeks. The factory scenes that take place in the Battery were filmed at a rotting soap factory in Wilmington, California, for ten nights. The Ardmore Police roadblock was filmed near 6th street in East Los Angeles, near the flood basin. Although three districts are seen, the city has a total of five districts: the Richmond, the Strip, the Battery, the Cliffside, and the Bayside.