Recent studies suggest that smarter children are more likely to partake in drugs and alcohol when they grow up, which means it is very possible that the gang at your local tavern are naturally smarter than the eggheads spending Saturday night at the library. (sidenote: the smartest of all of them may be the one alone in the library with a book in one hand and a flask in the other.)
Of course, very few people are smarter while drunk, so booze may be a kind of temporary cognitive equalizer.
We all need to go to Stoopidtown from time to time, but people born and bred there have little need for alcohol. Others fall a little too in love with liquor and become permanent ex-patriots from Smart. Most of us, however, just take the occasional weekend excursion across the border into Impaired Judgement because it's a great place to meet people.
Be on the lookout for new places with strong cocktails and brilliant people opting out of their own intelligence.