Magic Theater

October-June, Tuesday-Saturday evening, Sunday matinee (occasional other days)
Location: Fort Mason, Two Marina Boulevard, Building D
Why Participate? Ushers welcome for theater company known for presenting thought provoking new plays, playwrights
Benefits: Free admittance to shows with great seats, 50% off at concessions lounge
More Information: Magic Theater

Additional Resources

SF Fun Cheap
Lists a variety of event volunteer opportunities, including beach/neighborhood clean-ups, community garden help, and concerts

Parks Conservatory
Calendar of Golden Gate National Park events, including volunteer clean-ups, restoration, and more

California Coastal Commission
Annual fall coastal cleanup day, check area map for specific sites (September)