Forget the Day-Glo alcoholic slush. Fine margaritas aren't squeezed out of plastic tubular contraptions, they are shaken fresh and served tall on ice with a delicate ring of salt. Hovering somewhere in that netherworld between tart and sweet, the perfect tequila tonic goes down like Kool Aid and knocks you off your feet with barely a whistle of warning. With more than 150 varieties of tequila, Baja Café is a veritable shrine to the fine Mexican alcohol that has been responsible for more than a few whopping headaches. We say can the Cuervo and ask Baja's margarita maven to reach for a silkier cousin, say El Tesoro Blanco or Lapiz. Those with a few extra Benjamin Franklins to spare can sample some of the finest tequilas in the world, as pricey as fine brandy at $75 to $100 a shot. Or if you're short on cash you can always pay with your Mexican credit card, explained as a big black revolver by a sign across from the bar.