Kelly: I'm not really that surprised about Billings being high on the list. Guessing that DUIs per capita is one of the metrics, as well as % of binge drinkers from some survey.
There are other metro areas where drinking is more prevalent - i.e. any city in Wisconsin, many places in the northeast (Boston, Buffalo, etc...). Especially Buffalo. Crap, there's nothing to do there except eat wings, drink, and watch it snow.
Boston being the least drunk city is just stunning. Having spent some time there, I would have guessed they'd be with Billings at the top of the rankings.