I appreciate both sides of the argument here. Obviously one never wants to end up on the wrong side of the law or in an awkward situation like dropping your underage drunk date back to their parents etc. But what's so wrong with having a drink or two at dinner? I mean, you're not drinking on a empty stomach and over a long meal you two are hardly going to get seriously wasted. Maybe its just my own experience, but this kind of thing happens all the time. Provided both people are responsible about the whole thing it shouldn't be a problem.