The third time's a charm for the margaritas served at Dixons, Racines and Goodfriends, a trio of local eateries owned by Lee Goodfriend, David Racine and Dixon Staples. Try as we might, and we've tried them all (it's a dirty job but we're urp to the task), we have yet to find a better margarita. The devilishly good drink is in the details: For the hand-shaken house margarita, an icy, twelve-ounce shaker is filled with Sauza Gold, blue agave, lime and triple sec (so austere, so sincere); the Greyhound adds a grapefruit bite for more adventurous drinkers. Or pair your favorite mixers with one of their dozens of tequilas. Conveniently, it just so happens that these elixirs go remarkably well with the Southwestern food at Dixons, the upscale sandwiches at Racines, and the just-in-for-a-quick-bite snacks at Goodfriends. Too many of these potions, though, and you'll need more than the hair of the dog to recover the next morning. Might we suggest a hearty breakfast at Racines or Dixons?