I heard some higher officials including security people to mingle into gamblers like other gamblers to watch any kind of breach and then signal to control room if anything unusual happens. I have not seen any such people doing but I guess it could be another thing might be happening on physical casino just to ensure their environment go intact. From all these I just conclude running a physical casino is not a simple business rather than that, I may go simply owning an online casino.
Nah, the eye in the sky is already enough for casino operators to catch the cheater, we all know that there are a lot of cameras and for sure those who are going to attempt to cheat are being caught in the camera. But I would say that casino officials most of the times do talk and mingle to players, and specially if you are a long time player of a certain casinos, definitely you will be recognise from dealers to pit boss around. Maybe some of them are friends outside for all we know.