I plan to do the Supermarket Street Sweep, Saturday at noon. A race around town to pick up a collection of food (to be donated to the SF Food Bank). You get the checklist of stores to visit and things to buy at each one when the race starts, so you have to decide right then what set of routes to take to optimize your path…

The SF Bike Coalition throws a party (beer, auctions, DIY activities, raffle, food, art) every year. Winterfest is this Sunday evening. You can get in free if you volunteer– I’ll be pouring beer in one of the tents.