Yes. When I was 5'5 and 109lbs, I was drinking 6-10 diet coke and rums a night on the weekends. Weight loss? Yes. Healthy? Erm, no
10 shots of rum and 109lbs leaves you too drunk to even eat a meal. Wasn't the best time of my life.
As long as the alcohol doesn't impair your judgment when there's bar food around (ie. wings are a lot harder to say no to after 5 drinks), then I think you could budget in a drink or two. Factor in your calories. Diet coke and rum is lower calorie.