I'll be in SF in January with my submissive girlfriend, and we'd like to know if there are any sites--dungeons or such--that can be rented for an afternoon or evening for two consenting adults to enjoy themselves fully using the equipment in the place and the equipment nature gave them. Any suggestions?

Haven't been there in years, but they used to rent out their dungeon space for private use.  Website and contact information is at:  http://www.backdrop.net/?