Drink, hurl, repeat. Brag to friends: "Dude! I was hammered." A notice stating you puke, you clean suggests that wastoids may indeed be the target market; a drink called Ass Juice (boasting "a little bit of everything and a whole lot of love") confirms it. Huge, dark and surprisingly clean-smelling, Double Down--an offshoot of the Vegas punk bar of the same name--strives to be a dive and, by God, it succeeds.