BEST NEW DRAMA Does Jesus Drum? Sometimes great gifts come in small packages. Set during the Civil War, Robert Linfors's brief playlet packed a real punch by examining the anguish and fear of parents whose fired-up young son is ready to enlist in the Confederate army. Linfors's timeless dramatic dilemma clearly resonated in today's wartime environment, and City Theatre's cast, featuring Elizabeth Dimon as the grieving mother, made a lasting impression.