Depends on your plan and what it allows. I allow myself a glass (or even two) of wine and the occasional martini. I keep within my calorie range for the day and so far I've been ok. I wouldn't make a habit of it. Don't forget that these are 'empty calories' and have no nutritional value. Been dieting for about 9 months and have lost a total of 36 pounds (33 before I joined 'fatsecret'
. My goal is to lose slowly (1-2 pounds a week). So far, with or without the 'beverage', I've managed to maintain this goal.