5 p.m. – Martial arts instructor Michael Issa discusses the history and benefits of martial arts. He also will give a demonstration and short lesson. Free and open to all. For adults, 18 and older. A screening of the martial arts film “Hero,” staring Jet Li, follows, from 6-7:45 p.m. Dunwoody Public Library, 5339 Chamblee-Dunwoody Rd., Dunwoody, 30338. For more details, call 770-512-4640.