As somebody who enjoys adult beverages quite often, I can honestly say that, for me at least, the language filter is the first thing to go. It isn't necessarily intentional, but after a handful of beers, my vocabulary goes from college graduate straight to sailor at sea. I would hate to offend someone without realizing it and having it mentioned calmly and rationally. A simple, "Hey, do you mind toning down the language a bit? I have my kids/grandkids/wife/mistress with me," can often go a long way. If they get angry or confrontational about it, it's time to let security do their job.