We had no idea. In addition to the How Weird Street Faire, happening this Saturday from 11:11 a.m. to 5:55 p.m., and the Inline Skating Marathon (for reals?), which takes place on Sunday from 8:00 a.m. to 3:00 p.m in Golden Gate Park, you can also celebrate the art of getting stoned. Dude. This Saturday, May 3, is National Pot Smoking Day, or something like that. It takes place at Civic Center Plaza across......