Samford University Percussion Ensemble is performing Nov. 2 at 7:30 p.m. in Brock Recital Hall. For information, call 205-726-2851. Samford University Instrumental Chamber Ensembles will perform Nov. 7, 7:30 p.m. in Brock Recital Hall. For information, call 205-726-2851. Samford OperaWorks will present a concert of scenes and the one-act opera “The Face on the Barroom Floor” by Henry Mollicone Nov.…