The San Francisco Bicycle Coalition takes a well-deserved break from its activist role each year to celebrate members’ accomplishments and drum up cash at Winterfest. In its 20th year, the party promises to be bigger than ever with a local art auction, DJs ShOOey and Sinned providing the dance tracks and pedal fuel from Bicycle Bánh Mì, Sugarfoot Grits and Nopalito. Not a member? Not a problem. One ticket level option includes the cost of a shiny new membership, and you can bid on a new bike while you’re at it.