I have no idea of this shop or cinema, cause I live in Germany, but it would be interesting to know. But I can answer your question:
Grindhouse cinemas showed always the too extraordinary, gory and independent-movies that were not in the multiplexes. But they become cult soon. Stars of the Grindhouse cinema are especially Gordon Liu (Shaw Bros. studios), Sonny Chiba, Bruce Lee and of course Pam Grier, Robert Forster, David Carradine etc.