Two of Mexico’s leading mariachi ensembles, Mariachi Vargas de Tecalitlán and Mariachi Nuevo Tecalitlán, perform a concert of traditional and contemporary mariachi music at the Rosemont Theatre in the Chicago suburb of Rosemont. The program showcases virtuosic string, trumpet, and vocal arrangements that highlight the ensembles’ long-standing roles in preserving and popularizing mariachi repertoire. The event is notable for bringing together these influential groups on a major suburban concert stage.