Columbus day festival, Broadway from Bowling Green to Fulton St., 212-809-4900: Oct. 13-International Street Festival celebrating Columbus discovery, 11 a.m.-6 p.m., free admision.
Battery park city parks conservancy, 212-267-9700: FIGURE al FRESCO, Wed., 3-5 p.m., South Cove: Learn figure drawing outdoors with a clothed model and an artist/educator. Call for registration: INLINE SKATING, Fri.-Sun., various times: call for schedule of classes with experienced skating instructors; LUNCH HOUR BACKGAMMON & CHESS, Mon. & Thu., noon-1:30 p.m., the Upper Room: Enjoy these popular strategy games with experts on the games; SUNSET JAM ON THE HUDSON, Fri., 6:30-8:30 p.m., Wagner Park: Join others in a drumming circle led by a master drummer, instruments provided or bring your own; TAI CHI, Thu., 4-5 p.m., Rockefeller Park, Fri., 8:30-9:30 a.m., Esplanade Plaza: Learn the ancient Chinese Martial art with a master; VOLLEYBALL AFTER WORK, Wed., 6-7:30 p.m., Esplanade Plaza: Join other adults for a good-natured games of volleyball; WOMENS BASKETBALL, Mon., 6-7:30 p.m., Rockefeller Park: Join other women for after-work basketball.
OUR LADY OF POMPEII CHURCH, 25 Carmine St., 633-9868: Sat. & Sun.Antique/flea market, 10 a.m.-dark.
South Street Seaport Museum, Pier 16, 212-748-8758: MUSEUM BOOK CLUB, a new title is selected each month, call for information.
Wall Street Community Day Festival Series, Wall Street from Water to South St., 212-809-4900: Oct. 24-Classic closed street fairs through the fall, 11 a.m.-6 p.m., free admission.