From EBBC:

Join the East Bay Bicycle Coalition, Walk Oakland Bike Oakland and hundreds of cyclists in wrapping up the excitement of Bike to Work Day with our biggest, most extravagent ever Bike Away from Work Party and celebration. The Bay Area’s biggest Bike to Work Day party culminates weeks of great bike events and preparations for the largest bike event in the Bay Area.
This year’s gala event features:

• The Muddy Roses Band
• the Big Tadoo Puppet Crew’s bike safety puppet show returns
• the fabulous Derailleurs dance show
• Cyclecide Heavy Pedal Bike Rides
• Bike Commuter of the Year and Bike-Friendly Business Awards
• music, raffle prizes, food and drinks from Trumer Pils Brewery in Berkeley and Clif Winery, all sponsored by the East Bay Express.

Full details on Bike to Work Day