What is "noisebridge"

Noisebridge is an award-winning anarchistic educational hackerspace in San Francisco, inspired by hackerspaces in Europe, like the Metalab in Vienna and c-base in Berlin. It is a registered non-profit California corporation, with IRS 501(c)(3) charitable status. According to the Noisebridge website's Vision page, "Noisebridge is a space for sharing, creation, collaboration, research, development, mentoring, and of course, learning. Noisebridge is also more than a physical space, it's a community with roots extending around the world." It was organized and began regularly meeting in 2007 and has had permanent facilities since 2008.