California Hall - Credit: Wikimedia Commons
California Hall, originally named Das Deutsches Haus (English: The German House), is a historic commercial building and event venue built in 1912, and located in the Polk Gulch/Tenderloin neighborhood in San Francisco, California. It started as a German social meeting hall. At the 1965 Year Years Ball, a fundraiser took place in the building for many gay charities, and brought trouble with the police and a legal battle. The event marked a turning point in gay rights in the west coast. It later was a popular concert hall in the mid-1960s and 1970s; performers that played at the California Hall include Jefferson Airplane, Moby Grape, Big Brother and the Holding Company, the Grateful Dead, and Quicksilver Messenger Service. Read more on Wikipedia
Source: en.wikipedia.org