They did this a Chappelle show I went too in NYC. You could keep bring your phone into the show but it had to be locked I a thick neoprene pouch they gave you

They did this a Chappelle show I went too in NYC. You could keep bring your phone into the show but it had to be locked I a thick neoprene pouch they gave you. When you left the show there were people there it open them (they were locked magnetically somehow) I think it was this one https://www.overyondr.com/howitworks https://www.overyondr.com/howitworks