From my experience of gambling in a casino I'd say that there have been times when I started losing consistently and it was as if I knew I had outstayed my welcome.
Now, I know that if I feel that I'm tired, or negative or I'm not enjoying being at the tables I must leave. Is this superstition? I don't think so. It's more like an inner knowing.
Usually the body knows directly when time is up, but it's the silly mind that says: "oh no, that's just imagination, let's look at it logically... if I do this and that ... it will be OK!..."
Always listen to your intuition. AND stay away from people with a negative energy about them. They can easily infect you with their negative thoughts. That goes for all walks of life, not just casinos.