The Rocky Horror Picture Show verbatim at each screening. Performance groups became a staple at "Rocky Horror" screenings due in part to the prominent New York City fan cast. The New York City cast was originally run by former schoolteacher and stand-up comic Sal Piro and his friend Dori Hartley. Hartley who portrayed Dr. Frank N. Furter, was one of several performers, including Will Kohler as Brad Majors, Nora Poses as Janet, and Lilias Piro as Magenta in a flexible rotating cast. The performances of the audience was scripted and actively discouraged improvising, being conformist in a similar way to the repressed characters. On Halloween
The Rocky Horror Picture Show made its U.S. debut in Los Angeles in 1974 before being played in New York City as well as other cities. Producer and Ode Records owner Lou Adler attended the London production in the winter of 1973, escorted by friend Britt Ekland. He immediately decided to purchase the U.S. theatrical rights. His production would be staged at his Roxy Theatre in L.A. In 1975, "The Rocky Horror Show" premiered on Broadway at the 1,000-seat Belasco Theatre. The film was shot at Bray Studios and Oakley Court, a country house near Maidenhead, Berkshire, England, and at Elstree Studios for post production,