The Riverside Church, New York City, is presenting its annual summer organ series on Tuesdays at 7 pm: July 3, Christopher Johnson; 7/10, Ulrike Theresia Wegele; 7/17, Christopher Creaghan; 7/24, Harry Huff; 7/31, David Briggs; and August 7, David Davies. Prior to each concert, a carillon recital begins at 6:30 pm. For information: 212/870-6721; www.theriversidechurchny.org.