“Your Best Assets are Human — How to Hire and Retain the Best Employees,” an HR seminar sponsored by Greater Bethesda-Chevy Chase Chamber of Commerce.  2 p.m. to 5 p.m. at Imagination Stage in Bethesda. Business After Hours event 5 p.m. to 7 p.m. at the Hard Times Café in Bethesda. Cost: $35 for members, $40 for nonmembers. www.bccchamber.org