Centertonix: A Cappella Concert — Tuesday, August 14, 2:00 pm. A Cappella explosion! Please join us at the Mashpee Senior Center to enjoy the a cappella group Centertonix. Centertonix is an exciting ensemble with a variety of ages and vocal talents whose mission is to entertain with an inspiring sound while educating audiences about the wide variety of a cappella genres. Please Rsvp to the Mashpee Senior Center, (508) 539-1440, or stop by the front desk to sign up. For more information, please contact our Activity Coordinator, Susanne Murphy, at (508) 539-1440, x3512.