On Saturday and Sunday nights, a group of wandering mariachi singers pass through this restaurant as you dine. On any night you can enjoy whopping 46-ounce margaritas, Mexican beer and an array of Tex-Mex specialities. Tucked away in a tiny shopping-office strip handsomely landscaped with big oak trees, this small restaurant is loved for its food, camaraderie and modest prices. As for décor, you'll find booths and tables on a covered patio and three other rooms, the back one of which is the most intimate.