Dordt Choir to perform in Sunnyside The Dordt College Concert Choir from Sioux Center, Iowa will present a concert at Sunnyside Christian Reformed Church on Saturday, March 13, at 8 p.m. The church is located at the corner of 16th Street and Franklin Avenue. The free concert is part of a music tour of seven states and Canada, with performances of music by Bach, Parker and Gjeilo, as well as folk songs from the British Isles, American spirituals and other traditional selections from around the world.