Volumes have been written on this topic, and the disquiet and discord about where the "hot" slot machine games are placed in the casino are still taking place – over sixty years after slot machine games were 1st added to the gaming floor in casinos.
The standard rule is that the more favourable slot games were installed just inside the main foyer of the casino; so that fun seekers going by would be able to see jackpot winners … be mesmerized enough to come inside and play. Our conclusion is that this is definitely no longer so.
Practically all of the mega casinos nowadays are mammoth complexes and now you can’t see inside from the sidewalk, so there is no longer a reason to position the ‘loose’ slot machines close-by any of the doors.
An additional standard rule is that loose slot games are put on the major aisles inside the casinos, again so that more potential gamblers could see winning jackpots and be influenced to play. Nonetheless, we find that this also is no longer a universal rule.
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!
In recent times, casinos are constantly changing their perspective about where to place the loose slots.