"There out to be a plaque on the building," says Bay Area Reporter porn critic John Karr, who went to this bookstore to cruise and flip through dirty magazines. Store owner Roland Boudreaux eventually opened a non-smut operation next door with a connecting doorway so that customers could leave and enter without attracting stares from high-society queens.

9. The Lusty Lady

1033 Kearny

The original Lusty Lady showed 16mm films, but by the early '80s this North Beach smut center had live dancers as well. In 1997, the dancers organized an Exotic Dancers Union to make it the first unionized sex club business in the United States. In 2003, they bought the business, making it a worker-owned cooperative.

10. The Gordon Getty Mansion

2050 Jackson

During the '80s and '90s, this Pacific Heights mansion was the home of smut merchant and Falcon Studios honcho Chuck Holmes, whose name now graces the LGBT community center on Market Street. In the afternoons, he shot gay porn in the basement. In the evenings, he hosted spectacular galas to raise money for visiting politicians.

11. The Armory

1800 Mission Street

Does anyone not realize that this former munitions warehouse now houses an arsenal of dildo-equipped robots and that the National Guard training hall is used to film "Wired Pussy" episodes? Thanks, Kink.com for making sure San Francisco is still known as the Smut Capital of America.