When my family and I arrived 5 minutes before the end of happy hour at Hog and Rocks in the Mission District we quickly ordered 18 oysters for the 3 of us. Next time, we're getting at least 2 dozen. Chilled, fresh oysters are one of my favorite bites to eat.
Aside from oysters (the rocks), there's also a good choice of hams (the hog). This restaurant and bar has a great menu variety with fun modern twists on bar food. The whiskey selection is really fun, too. This is a fun, chill place in the Mission that serves great food with a casual vibe.
If you can't see the slide show here, check out my Flickr album: Hog and Rocks