The Gentlemen Songsters, the Lowell chapter of the Barbershop Harmony Society, promise a wonderful evening of a cappella holiday music. The award-winning chorus, which consists of approximately 30 members from all over the Merrimack Valley, are well known for their four-part, unaccompanied, close harmony singing. The Gentlemen Songsters return to the Tewksbury Public Library after receiving standing ovations during the library's 2017 Outdoor Summer Concert Series and 2014 Festival of Trees Opening Night Gala. Sponsored by the Friends of the Library.