(168 to 504 Calories)
A better choice: Tequila over ice with two limes (100 calories)
The biggest threat posed by a margarita, says Jarosh, is the nonstandardized size. "Some places serve them as 8-ounce drinks, others as 12 ounces, and that can make a huge difference," she says. You'll always know how much alcohol you're getting if you order a shot of high-end tequila on the rocks with maybe a splash of soda and an extra lime, and this makes for a good sipping drink.