Books have been said on this matter, and the conflict and discourse about where the "hot" slot games are placed in the casino are still bubbling – over 60 yrs after slot games were 1st added to the gaming floor in gambling dens.
The classic rule is that the better one armed bandits were put just inside the main entryway of the casino; so that individuals passing by would see real jackpot winners and be aroused to come unto the gambling floor … play. Our frame of mind is that this is no longer the case.
Just about all of the mega casinos presently are oversized complexes and you no longer can see inside from the sidewalk, so there is no longer a reason to put the ‘loose’ slot machines in close proximity to any exits.
Yet another traditional rule is that loose slot machine games are put on the major aisles inside the casinos, again so that more potential gamblers could see winning jackpots and be energized to play. Importantly however, we find that this also isn’t a universal rule any more.
What casinos found over the years is that people walking down the busy aisles were frequently on the way to somewhere else. If they played slot games at all, they would simply put in their loose change because they happened to be walking by. Win or lose, they would very often not stop to keep playing. And the very last thing a casino wants is for someone to win a jackpot by playing only a few coins and then not stay to put it all back in!
In recent times, casinos are constantly changing their philosophy about where to place the loose slot machine games.