I exercise faithfully 6 days a week, I do 3 days of strength training (just finished up STS for the 4th time!) and I do light cardio on the days I do weights, then longer cardio other 3 days. I also have a glass of wine almost every night with dinner and two mixed drinks on Friday and Saturday nights. So far, its not affected my weight. What I do is this, before and after I have a drink, I make sure to drink 32 oz of water. OK, I know that sounds like a lot of water, but alcohol dehydrates the body, so I feel that by staying hydrated it helps to counteract that, as well as flush out my system quicker. As for the mixed drinks, I drink Bacardi light rum and Diet Coke, but I only drink those on the weekends. I like margaritas, but I probably haven't had one in several years, they are just so full of sugar, I would feel weird when I drink one from the sugar rush.
Also, having drinks at home is much more affordable than having them at a restaurant or bar. Two glasses of wine at most restaurants is about $14 and for that you can buy a decent bottle of wine at the grocery or liquor store. And, they make those low sugar and sugar free margarita mixers that I don't think are offered at restauraunts. Plus, not only does having drinks at home save money, it can save lives too. I personally do not like to drive even after having only one drink while out.
I work a very stressful job and I enjoy coming home at night and having a drink. Honestly, I didn't drink until my husband & I married because my friends and family never did, but when we got together, much of our social life involves having drinks.
Hope that helps, good luck to you!