Books have been set forth on this topic, and the disquiet and feuds about where the "hot" slot machines are positioned in a casino are still rampant – more than sixty years after slot games were first added to the gaming floor in gambling houses.
The quintessential rule is that the more favourable slot machines were put just inside the door of the casino; so that individuals going by would see jackpot winners … be drawn to come unto the gambling floor … play. Our frame of mind is that this is not so anymore.
Practically all of the big name casinos nowadays are monstrous complexes and it is not possible to see inside from the sidewalk, so there’s no longer a reason to place the ‘loose’ slot machines close-by any of the doors.
Yet another classic rule is that loose slot machines are installed on the major aisles in the casinos, again so that more persons could see winning jackpots and be roused to play. Nonetheless, 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 slots 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!
These days, casinos are constantly changing their perspective about where to place the loose slot games.