Whenever I go to Half Moon Bay, I have to stop at the Half Moon Bay Brewing Company. Setting aside for a moment that they make a spectacular hefeweizen, the food and atmosphere are great, too.
I spent two weeks in HMB about five years ago, and I pretty much lived on their beer and steamed clams. The clams are served in a white wine-based broth that can't be beat.
Edited to remove Verizon's spam.