Once known more for its sandboxes and unsupervised children, Lupe Tortilla has done an about-face by removing the play areas and focusing attention back on what made the chain famous: fajitas. The lime-laced marinade renders the beef both tart and sweet, with an unmistakable flavor that’s often imitated, never duplicated. Also noted for their full-bodied flavor: the complimentary salsa fresca that’s served with every basket of chips and the margaritas made with fresh-squeezed juices.