Bartender: Jennifer, 27
Her Bar: Maracas, NYC

Question: What's your best hangover cure?
Answer: "I'm sure you know that drinking water between drinks will help fight a hangover. But here's how to look cool when drinking water at a club: Work with us. Buy—repeat, buy— a bottled water from me, tell me what you're doing, and I'll hook you up, and make it look like a drink each time. Ask for a free glass of water, you broke ass, and you'll never see me again."