The Bachelor Party. In the UK, it's known as "Stag Night"; in France, "enterrement de vie de garcon" - literally, "burial/funeral of the life as a bachelor." For grooms-to-be across the globe, it is a time honored tradition, and in the US, Las Vegas is commonly known as the ideal destination for this debaucherous weekend of gambling, drinking and good-natured hazing. Perhaps thanks to the oft-uttered mantra of "what happens in Vegas stays in Vegas", most bachelors return home no worse for the wear. For others, however, "what happened in Vegas" has resulted in damaged or broken marriages, and one Massachusetts husband will be paying the price for his misdeeds in cold hard cash.