Once you've asked for comps, or asked to be watched in the hope of getting chomped, the casino will select someone to watch your action. That someone will probably be a floorman in a gambling pit. If you're playing blackjack, the floorman will be assigned to the pit you're playing in, and you should stay there if possible. If one table seems bad, go to another table in the same pit. If you want to move to another part of the casino, let the floorman know you're doing this, rather than just leaving.

When you get to another pit in the casino, tell the floorman there that you were playing at a different pit where you were being rated as a player. He or she will make a call to the previous pit and speak to the floorman there, and your rating will continue: But just what do these casino personnel rate?
They generally break your action down into three parts. First they'll note the time you start playing.

Then they'll note, the average bet you are making. And finally, they'll put down the time you stop gambling. Note that I said they study your average bet. No one expects you to make the same bet over and over again. Gamblers run in streaks, no matter what of luck they're experiencing. Gamblers like to play the rush; that is, when they're winning, they like to press up or increase their bets. Conversely, when losing, they tend to lower their bets.

This is understood by casino personnel. As I keep mentioning, they are flexible when assessing gamblers. A player may test the waters with $50 bets, then start plunking down $200 wagers. If he gets on a rush of winning bets, he may go to $500. All this is taken into consideration by the person watching his action.

On the other hand, a player may start off horribly and never recover. Within an hour he's been wiped out. Let's say he took a marker for $3,000 and lost it all in that short space of time. He stops betting and retreats like a wounded his room or the pool or wherever he can get some mind and recoup his energy. The casino observer is noting this, and the fact that he only played for one hour instead of four won't be held against him.