The service takes place at 5 p.m. Sunday, Dec. 10, in the Bates College Chapel, College Street. It is open to the public at no cost. For more information, call 207-786-8272. To see all events open to the public at Bates this month, visit the online Public Events Calendar. To receive the printed monthly calendar Bates Invites You, please call 207-786-6330 or e-mail the calendar editor. Performers include three student vocal groups, the Crosstones, Merimanders and Northfield; jazz guitarist John Smedley, a member of the physics faculty; and violinist Hilary Ginsburg, a sophomore from St. Louis, Mo. Organist for the service is Andrew Shenton, James R. Houghton Scholar of Sacred Music at Boston University and an internationally acclaimed musician.