One of California’s principal Mexican folk dance companies, Instituto Mazatl¡n Bellas Artes, is taking S.B. by storm this week, making two stops here as part of !Viva el Arte de Santa B¡rbara!, a series of dance and music performances sure to dazzle all spectators. Don’t miss these free performances this weekend at Isla Vista School (Fri., Feb. 20, 7pm) and the Marjorie Luke Theatre (Sun., Feb. 22, 7pm). Call 893-4979 for more info.