Boulder Creek Liquor is a small place, but they've got a surprising variety of liquor products there. There is an extensive wine collection, including labels from local mountain vintners.
You can even get specialty liquors here. I located a hard to find bottle of fancy rum for a friend in this humble little establishment!
Boulder Creek Liquor is probably the only liquor store with a florist right on the sidewalk in front of the store. This is convenient because you can get your sweetheart a bottle of wine and some flowers!