Dilemma: It’s a Friday night after a long week at work, and you just want to kick back, unwind, and get trashed. Problem is, your friends want to go to some posh bar downtown, and you have only a twenty on you. How in the world are you going to get drunk on twenty bucks at a bar that sells ten-dollar martinis?
Solution: Buy an energy drink at a liquor store and use it as a mixer.
Why this works: Energy drinks have caffeine in them, which causes your veins to expand, allowing the alcohol the beverages are mixed with to circulate faster. A lot of energy drinks also have an amino acid called taurine in them, which helps speed up your metabolism. This causes you to feel the effects of the alcohol faster than you would under normal circumstances.
Taken From: http://lifehacker.com/5020470/get-drunk-faster