Jim Connell and Paul Currier in performance at a recent Andover Community Coffeehouse.

A 16-member a cappella (without accompaniment) group of singing students from Colby-Sawyer College in New London will be the featured performers on Friday evening, February 19, at the monthly Andover Community Coffeehouse concert, offered in the Highland Lake Grange Hall in East Andover. The event, which begins at 7 PM, is open to the public at no charge; donations are accepted.

Known as CS Riffed, the group has been performing together since 2014 and is the only student-run musical program at the college. Its repertoire is described as being “aimed at a variety of audiences, with a passion for rehashing contemporary hits and classical favorites alike. Riffed is always ready to perform and is excited to continue to grow in the future.”

CSC Riffed lists its participants as “three basses, four tenors, four altos, four sopranos, and a beatboxer.” (A beatboxer is a person who “mimics drums and drum machines using his or her mouth, lips, tongue and voice,” according to Wikipedia.) The group’s videos can be seen at Facebook.com/cscriffed.

Also appearing onstage will be up to a dozen open-microphone performers, whose contributions in previous months have ranged from the spoken word to show-business, jazz, folk, bluegrass, and country-and-western tunes.

Doors to the Grange Hall will open at 6 PM for food purchases offered by the Andover Congregational Church and for open-mic sign-ins on a first-come, first-serve basis. Sponsor for the evening is Fenton’s Construction of Andover, whose donation covers rental of the Grange Hall.

Video recordings of past programs are shown on a number of community-access channels across the state and are available on Andover’s town Web site at Andover.nh.us by clicking on “Town Information” and then “Video Archive.” The video programs are produced by volunteers at Andover Community TV.