Books have been written on this issue, and the conflict and arguments about where the "hot" slots are installed in the casino are still taking place – more than sixty years after slot machine games were 1st added to the gaming floor in casinos.
The classic rule is that the very best slots were located just inside the main door of the casino; so that potential gamblers going by would see jackpot winners … be captivated to come inside and play. Our thought is that this is no longer the case.
Just about all of the mega casinos presently are titanic complexes … it is not possible to see inside from the sidewalk, so there’s no longer a reason to situate the ‘loose’ slot machines close-by any doorways.
Yet another standard rule is that loose slot machine games are placed on the major aisles in the casinos, again so that more persons could see winning jackpots and be roused to play. Notably however, we find that this also is not 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 the slot machines 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 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!
These days, casinos are constantly changing their perspective about where to place the loose slot games.