By Bill Lynch WANT TO GO?Shen YunWHEN: 7:30 p.m. Tuesday, WednesdayWHERE: Clay CenterTICKETS: $50 to $150 (based on seating)INFO: 304-561-3570 or www.theclaycenter.orgBy Bill LynchStaff writerAround Charleston, the advertisements are next to impossible to miss. "Shen Yun at the Clay Center." There are fliers, posters, billboards and a kiosk at the Town Center Mall.Some of these announcements have been up for months.