Tucked away inside the posh architecture of the Ritz-Carlton Key Biscayne, you'll spy a thatched hut that's light years away from the kind of prissy sensibility one might expect from such a fancy-pants hotel. Cantina Beach feels like a different key than Biscayne. After a decadent evening of tequila shots, passion fruit margaritas, and freshly made guacamole at this oceanfront restaurant, you just might begin thinking you've crossed the Seven Mile Bridge and gone to Key West. The view of the Atlantic is breathtaking, the décor is to die for, and the menu offers 50 different tequilas. Ay, caramba! A lush could get into a world of trouble in a place as wonderful as this one.