When I was in college, I read in a theology book that a monk on a mountain top and a man with his bottle of wine are really trying to get to the same place. That place translates to peace and a genuine feeling of being connected to the rest of the universe. Dreaming about being in bars and drinking may symbolize a need that you have for some type of a meaningful transformation. On the other hand, this dream may be a form of wish fulfillment, and you are escaping into a pleasurable environment where daily cares and concerns are meaningless.
If you rarely allow yourself to relax and socialize, this dream may be compensatory in nature.