Some tequilas will strip the lining off your throat unless you dilute them with crushed ice and margarita mix. Others are so refined they deserve to be savored in snifter glasses. For those of you who appreciate the difference, a pilgrimage to the Blue Agave Club is a must. The restaurant's tequila list stretches out to six pages and more than one hundred bottles, all arranged by grade (blanco, reposado, a&241;ejo). If you have no idea what you're looking at, the waiters can help you order a complimentary selection of tequilas -- a clean, bright Arroyo Negro Blanco or a woodsy Chinaco Añejo, all served in snifters to magnify their subtle distinctions. And if you've been searching out a rare taste of Porfidio Barrique Añejo, the restaurant stocks it at $75 for a two-ounce pour. For those of you who need your booze all girlied up, the bartenders also mix a mean margarita -- or rather, thirtysome varieties of fruity margaritas, made with Herradura Silver.