From SF Bike Coalition:

Take a ride and visit two of San Francisco’s most inspirational and iconic non-profit institutions, SCRAP and Building Resources. SCRAP (Scroungers Center for Reusable Art Parts) is a 5,000 square foot creative reuse warehouse and workshop space, diverting materials from the landfill into the hands of artists, teachers, nonprofits and general public. At an acre and a half, Building Resources is San Francisco’s best source for reusable, recycled and remanufactured building and landscaping materials.

Free for SF Bicycle Coalition members; $5 donation for non-members; rain cancels rides. RSVP