i don't see a problem with a parent having a drink with dinner or after dinner or something like that. nick loves beer, he doesn't drink it to get drunk, he drinks it because he really likes it and likes trying different kinds. i think he considers himself a beer connoisseur.
now getting drunk in front of your children is not appropriate at any age. why is 14 the magic age? then they'll see how much "fun" being drunk is and they might want to go try it themselves.
aside from nick's taste for good beer, we're not big drinkers. we usually don't even have alcohol in the house so it's not really an issue with us.
oh, i forgot that my mom sometimes serves drinks when we have family dinners (wine at holidays, mojitos at bbqs, etc). we're usually just sipping drinks while we sit and chat, not throwing back shots and getting wasted. i don't see an issue with a bunch of adults sitting around over drinks.