Mariachi is a music born of many influences, including modern radio. The instruments, clothes, and voices are all part of a studied tradition. Tucson hosts an international mariachi conference every Apr., but mariachis play year-round at various Mexican restaurants, including La Fuente (Thurs.-Sun., 1749 N. Oracle Rd., 520-623-8659), Las Cazuelitas de Tucson (Fri. and Sat. nights, 1365 W. Grant Rd., 520-206-0405), and El Mezon del Cobre (Fri. and Sat. nights, 2960 N. 1st Ave., 520-791-0977).