Two Washington Based choir groups are putting on a joint concert this weekend. The Washington Choral Society and Sound of Washington will perform this Saturday. The Choral Society was founded nearly two decades ago as a fundraising organization. Sound of Washington is almost brand new. It’s a choir group for special needs adults. The concert is this Saturday night at 7:00 at the United Presbyterian Church in Washington. Tickets are 10 dollars for adults and 5 dollars for students.