Marc Huestis is an American filmmaker, camp impresario and social activist. He is best known for his motion picture Sex Is... and his in-person tributes/benefit events feting celebrities from Hollywood's Golden Age and cult personas at San Francisco's Castro Theatre.

The Castro Theatre is a historic movie palace in the Castro District of San Francisco, California. The venue became San Francisco Historic Landmark #100 in September 1976. Located at 429 Castro Street, it was built in 1922 with a California Churrigueresque façade that pays homage—in its great arched central window surmounted by a scrolling pediment framing a niche—to the basilica of Mission Dolores nearby. Its designer, Timothy L. Pflueger, also designed Oakland's Paramount Theater and other movie theaters in California during that period. The theater has more than 1,400 seats.