Ever wonder how many calories are in your glass of wine, bottle of beer or shot of whiskey? With light-beer makers touting calorie content on their brews and controversies over flavored alcoholic drinks such as Four Loco, the federal Tax and Trade Bureau, which regulates alcohol labeling in the United States, is renewing a push for everything from wine, beer, and vodka to have calories and nutritional information. While slapping more nutritional information on beer and wine could be welcome for carb and calorie counters, it could be a headache for producers, who fear they would be obliged to pay for expensive tests and change labels more frequently.