The first sign this drink isn't for amateur beverage lovers? The Chili Pepper, a brightly colored Mexican restaurant that is home to this lethal concoction, limits customers to two each. People who have yet to experience the Rosarito may scoff—but see how you feel after downing one. Tipsy as all hell, that's how you'll feel. The secret is a massive amount of Viuda de Romero tequila that is somehow masked behind the drink's citrusy mix to make it refreshing and delicious. It may look (and taste) like just another innocent margarita, but it'll knock you out.