No margaritas on the menu? No problem. Hit one of Philly's numerous BYO restaurants, and bring your own tequila to pair with your tacos and Tex-Mex. Check out our list of five great restaurants to stop by with your own bottle of silver or reposado in hand, including a NoLibs "pioneer" that will "mix you a pitcher of margs", a "cozy" white-tablecloth spot and an "upscale" "Cali-Mex" eatery. Tell us about other great BYO Mexican spots in the comments.