That's before you ever add in the mixers, which are usually chock full of calories and sugar. For those who prefer to stick with liquor drinks, opt for no-calorie mixers such as diet soda or diet tonic water. Beer isn't much better. A 12-ounce beer will set you back at least 120 calories, while a liquor drink may cost you 90 to 100 calories per 1.5 ounces. When mixed with soda or juice, that tally increases even more. In addition to the calorie count, there's also the fact that alcohol reduces your inhibitions. You'll be more likely to indulge in unhealthy foods that aren't part of your healthy eating plan. If you do plan on enjoying a few libations, factor them into your calorie budget for the day. You'll be less likely to overdo it.