Touts itself as the first Mexican restaurant in L.A., circa 1924 in a casita from 1850. We weren't around to confirm the legend, but we can affirm jet fuel strength margaritas, festive South o' border atmosphere, and a mix of tourists, post-work financiers, Downtown-fleeing artists, and Latin Eastsiders. Almost a microcosm of Los Angeles happy hour at its best. Enjoy the strolling mariachi...