Since they don't take reservations, Woodhouse is the classic example of a pop-in oyster bar. If you're wandering San Francisco and need that quick snack to get you up the next hill, step into Woodhouse and order up some oysters with a side of slaw. Since it's open every day except Thanksgiving and Christmas, you can always depend on Woodhouse Fish company. Two convenient locations, one downtown on Market and one in the Fillmore district, both close to public transportation. If you want some quality oysters but don't want to "put on airs" (or a tie) for one of the frillier oyster spots, head to Woodhouse Fish Company.