There are a number of math circles serving students, and teachers, in the Columbia area. Their regular meeting schedule is from 9am to noon on the 2nd Saturday of each month (at least during the school year). Meetings are regularly held at Hammond School (854 Galway Lane, Columbia, SC 29209). The cost is $25 per student for each meeting. Middle school teachers are invited to attend along with their students; there is no cost for teachers.
854 Galway Lane Hammond School
, SC 29210
33° 57' 44.8236" N, 80° 57' 59.13" W