Strand Theatre, 345 Main Street, Rockland, will host a concert by Latin Grammy–winning, New York–based mariachi ensemble Flor de Toloache at 7:30 p.m. on Sunday, September 22. Tickets are $20 in advance, $25 the day of the show. The quartet’s diverse ethnicities and musical backgrounds contribute to their distinctive interpretations, appealing to fans of both traditional and progressive styles of mariachi. Lobby and balcony bars will be open for those age 21 and older. For more information, visit rocklandstrand.com or phone 594-0070, extension 3.