Chappelle's new shows require phones to be locked in Yondr sleeves

If you're planning on attending one of Dave Chappelle's shows in Chicago in coming days, you'll have to lock your phone up inside a pouch from Yondr. Not familiar with Yondr? Most people aren't until they encounter a "no phone zone," Yondr's speciality. The company provides venues with soft cases in which attendees must place their phone. It is then …