May 13 dawned cool and overcast. But the sun shone from the smiles of the enthusiastic greeters at energizer stations set up for the Bay Area’s 16th annual Bike to Work Day. Cyclists received cheers, goodie bags and snacks to encourage them on their ride. Oakland rode: to school or to work, carrying children in child-seats or dogs in front baskets, bike bags loaded up for the day ahead. The streets were filled with the happy sounds of whirring chains and tinkling bells.