Cappella Cantorum and the Con Brio Choral Society presents its SummerSings series with a concert featuring "Messa di Gloria" by Giacomo Puccini directed by Steven Bruce of the Con Brio Choral Society on Monday, July 29; a concert featuring selections from "The Creation" by Joseph Haydn directed by Rachael Allen of the Shoreline Chorale at Westbrook High School on Monday, Aug. 5; and Gilbert and Sullivan choruses directed by John Dreslin of the Connecticut Gilbert and Sullivan Society on Monday, Aug. 12. All events run from 7:30 to 9:30 p.m. at St. Paul Lutheran Church, 56 Great Hammock Road, Old Saybrook. Registration begins at 7 p.m. All singers are welcome. The fee of $8 includes a borrowed score. For more information, call (860) 767-9409 or (203) 245-6947, or visit www.conbrio.org or www.cappellacantorum.org.