In the middle of the San Francisco Bay there are two small pieces of land -- Treasure Island and Yerba Buena Island -- and for nearly a century they were the domain of the military. If you've ever driven over the Bay Bridge, you've crossed these islands. And without knowing it you've come very close to what has been a tightly-held secret. It's a place where a group of artists are giving life to a relic from the island's past -- and hoping to save it from demolition.
Welcome to the Signal Room, Secret Venue for San Francisco's Arts Underground

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