A colleague of mine is the House Manager at a Broadway Theatre where a hit musical has been playing. I know when I began coming to Broadway shows in 1960, and for at least 30 years or so thereafter - maybe longer, there were never lines of people down th block trying to get into a theatre for a performance. I asked him one day what changed. His reply was simple and to the point. Ticket scanners are the answer. When you arrive with your group of 4, each ticket has to be scanned
individually. Before scanners ticket takers very quickly made sure there four tickets, and then tore all the stubs off simultaneously, and in you went. Adding 2-3 seconds or so the process for each ticket, 1200 tickets adds a LOT of time to the checking in process.