Folks who haven't yet discovered Alameda may want to come to one of the most fun events in the island -- the monthly Antiques Faire by the Bay http://www.antiquesbythebay.net/. It's billed as Northern California's largest antiques and collectibles show with over 800 dealers. According to theri website, everything sold at the show must be at least 20 years old, and no reproductions are allowed.
Whether you're a serious shopper or just want to hang out, this is a good place to be, especially with the City of San Francisco and the Bay as the backdrop, and with the wonderful climate. It's also a good excuse for people to get on their bikes and ride to Alameda Point (some folks from San Franciscos bring their bikes aboard the ferry for this event).
Here's what San Francisco Chronicle said about this faire: "Come early, Antiques Faiare is a buyer's market"
It's a bargain shopper's, home stagers' dream...all these wonderful stuff in one place!
And after you're all shopped out, go to Rosenblum's Cellars next to the ferry, for their wine-tasting until 6 pm.