Thayer Public Library will offer a tai chi class on Dec. 1 from 2 to 3 p.m. to any interested residents. Taught by experienced tai chi teacher Peggy Leung, the class is intended to be a calm and gentle way to move your body, offering relaxation and stress management. According to reference librarian Priscilla Crane, Leung has appeared at the library before, and her classes are quite popular. Because the event is held in the auditorium, there should be ample room for participants. For more information, contact the reference desk, 781-848-0405, ext. 4417, or e-mail email@example.com.