There's going to be a pretty righteous block party in San Francisco on September 12th. This neighborhood bash runs from 12pm-6pm. Thao & The Get Down Stay Down, a favorite of mine, are headlining the event. The 20th Street Block Party is free, so get there early in order to claim some real estate and catch the other acts. You may want to consider biking into the event. The 20th Street corridor will showcase San Francisco restaurants, businesses and artists in a celebration of their stomping grounds. In the Mission between Bryant and Harrison.