Halloween -- Columbia Gym and Supreme Sports Club are offering Halloween activities for children and teenagers: a Halloween Boo Bash for ages 3 to 10 from 10 a.m. to 11:30 a.m. Saturday; a Halloween sleepover for ages 7 to 12 from 8 p.m. to 8 p.m. Saturday; a Halloween skating party from 2 p.m. to 5 p.m. Sunday; and a Halloween basketball party from 6 p.m. to 7:30 p.m. Oct. 31. There may be a fee for activities. For a listing of events and locations: www.columbiaassociation.com/HalloweenEvents.htm.