CSM Chamber Singers Concert. 3 p.m., Dec. 1, College of Southern Maryland, Leonardtown Campus, Building A, Auditorium, 22950 Hollywood Road, Leonardtown. The CSM Chamber Singers will perform a one-hour concert under the direction of J.W. Maerhofer, CSM professor and chair of the Fine Arts and Humanities department. Free. 301-934-7790 or 301-870-2309 Ext. 5313 for Charles County, 240-725-5313 for St. Marys County or 443-550-6199, Ext. 5313 for Calvert County.