A: Ask your fiancé to talk to his hard-partying friend. If he feels awkward about singling out his pal, he could casually talk to a group of his friends—including Mr. Boozer—about keeping their party meters in check. These same friends can be pulled aside before the wedding and asked to keep an eye on Mr. Boozer at the reception. You can also set up some guidelines for bar service: No shots and no straight-up or on-the-rocks drinks should be served (mixed drinks only); and all beer must be poured into glasses. On your wedding day, have an attendant subtly point out Mr. Boozer to all of the bartenders. They can help you by serving this determined drinker watered-down drinks and only the smallest glasses of beer. If you still think he'd end up mooning your other guests no matter what you do, don't invite him.