Five Things to Know Today: December 20

1. A National MS Optimists Support Group meets at Lansdale Library at 7 p.m.

2. Craig Thatcher and Nyke Van Wyk perform at Sellersville Theater at 8 p.m. Tickets are $21.50 and $29.50

3. Montgomery County Young Democrats hold a meeting and happy hour at 5:30 p.m. at Houlihan’s, 601 W. Germantown Pike, Plymouth Meeting.

4. Barnes & Noble, 1271 Knapp Road, Montgomery, holds a storytime at 11 a.m.

5. Philly Sports Club at Highpoint in Chalfont holds a laser tag challenge at 6 p.m. for $12.