We love ourselves a happy hour as much as the next gal. And while the extra calories are usually worth it in the name of good times, arming yourself with cocktail-calorie knowledge could make the whole thing oh-so-much better.
So, we're taking the guesswork out of figuring out what to drink (and what not to drink — mudslides and mojitos, we're looking at you you) and why. Here, Keri Gans, M.S., R.D., C.D.N. (yeah, we got tired just typing that out), a nutritionist in New York City and the author of The Small Change Diet , weighs in on the rules of "healthy" drinking. Now, if only we could take away your hangover, too.