Is it acceptable to have an alcoholic beverage while on an interview?

I will be going on some interviews in the near future. All involve dinners with the School Dean, Department Chair and/or search committee. In many cases, there is more than one dinner as the interview may last 2–3 days.

So, my question is this. Does having a drink with dinner (i.e. a glass of wine) alter their perspective of you in a good or bad way? These dinners are more informal “get-to-know-you” events where they are trying to learn about you, and vise versa. They want to know if you are normal, as a commitment to you may be lifelong.

Obviously, I would never go overboard, but, is even a single drink a red flag or a marker that you are “down-to-earth” and “mature”?