Just one more "take it easy" warning - as folks have said, your tolerance will be down and it will hit you much quicker than before. I'd avoid shots (just because the effects sneak up on you and before you know it you're in trouble) and go for something you can sip on. Rum and diet coke, martini, red/white wine, go with something like that and take it slow until you know how it will affect you. Also, remember since you're not eating carbs that sometimes absorb the alcohol, you are going to have its full effects!

Oh yeah, one other thing to keep in mind...be aware that your inhibitions will be down, and so those potato chips, pretzels, popcorn, chocolate cake or any other carb-laden thing may not "seem so bad at the time!" Drinking can lead to an unintended carb-fest!