I used to be a heavy drinker...very heavy. The last 3 years I just hardly ever drink, and if I do it's very light. I'm not sure why, not a conscious thing, just older and wiser I guess. When I've lost weight before drinking was always a struggle, but now I don't even think about it. I've got 1 beer in my fridge that's been there for months, and that's the only alcohol in the house. Since I've been on the bike and diet, I did have a few vodka and club sodas at a meeting one night, but I worked them into my daily calories.
If you go to the bar and don't want to consume but also don't want to look like you're not consuming, order a vodka and club soda with limes and then just have them keep topping it off with more club soda. It's 0 cal. You'll look like you're banging them down all night and still be good to drive home and feel like working out in the morning. Win-win.