Jack Daniel's and Coke with a lime. The combination of alcohol, caffeine and vitamin C is the perfect drink to carry you through an entire weekend in Las Vegas without catching a cold. For the calorie conscious, diet coke will also work. That way you can have more Vegas Juice!
I was completely prepared for my weekend in Vegas. I drank vitamin water for two days before and Vegas juice for the entire trip. I slept two hours a day and feel just fine. Although I don't remember much.