Every February, the Chimes host their annual Cherry Tree Massacre, a concert series that celebrates the art of a cappella. The Chimes as an organization are forever indebted to John O’Grady (#89), who first proposed the idea of a Chimes-hosted concert series when he was a neophyte in 1974. Throughout the years, Cherry Tree Massacre has played host to Georgetown’s favorite a cappella groups, as well as top college groups from around the country. Professional singing groups including Rockapella and SPEBSQSA International Champions The Boston Common have also sung on the Cherry Tree Massacre stage in recent years. The Chimes are proud to continue this tradition year after year.