Description:The Mason City Chapter of the Barbershop Harmony Society presents their annual spring show "Doo-Wop-A-Shop" featuring the River City Barbershop Chorus local quartets and special guests the 2015 Sunshine District Quartet Champions and 2017 International 2nd place medalist, Signature. Performances at 2 p.m. and 7 p.m. Reserved seating only, #12 in advance, $20 at the door. Tickets available from any chapter member, or online, or call (614) 380-0406. See www.rivercitychorus.org for more information.