Weird interview experiences at breakfast jobs

These scenarios are for a breakfast serving job. So when the interview got scheduled, I showed up and the manager who was supposed to interview me didn’t even show up because he “forgot” (should have been a red flag to just not go back but whatever) We rescheduled and he was there and all was well, I got the job. Then months later he did the same exact thing to another girl. Rescheduled and then she got the job. And then the same thing again to another girl…rescheduled and she got the job. Then this scenario was at a different breakfast place: I get there, I tell the host I have an interview and she said the manager will be right with me. So I sit and wait. I don’t go on my phone or anything so it doesn’t look bad. I wait and wait and like 15 minutes pass, the host is basically just staring at me and twiddling her thumbs (there was nothing for her to do) Then once like 20 minutes pass she’s like “okay I’m ready to interview you!” She was the manager the whole time… and she just stood there and stared at me the whole time??? I got offered the job but I was so weirded out that I declined it. I thought it was weird so I mentioned it to one of coworkers one day and she said THE SAME EXACT SCENARIO HAPPENED TO HER AT THAT EXACT RESTAURANT. Except with a different manager! Same story, to the T. What the fuck are these tactics?? Are they to test you in some way? To see if you will accept getting treated like shit so they can walk all over you? Wtf is it?