“Carmen,” a tale of a seductive Gypsy whose songs entice her lover, soldier Don Jose, is one of the world’s best-known and popular operas. It’s the one with “March of the Toreadors.” See it for FREE at the Boulder Bandshell on Saturday, August 20, at 6 p.m. The Boulder Opera performs this tale love, lust and murder in a fully staged outdoor production that includes an ensemble orchestra led by Parisa Zaeri. Bandshell Outdoor Theatre, Broadway and Arapahoe, Boulder. For more information, call 303-731-2036.