Books have been said on this topic, and the conflict and discussion about where the "hot" slot games are located in a casino are still on-going – sixty yrs after slot games were first placed in the casinos.
The traditional rule is that the superior slots were positioned just inside the main entryway of the casino; so that folks passing by would be able to see jackpot winners … be mesmerized enough to come unto the gaming floor and play. Our opinion is that this is no longer the case.
Many of the large casinos presently are huge complexes and you no longer can see inside from the sidewalk, so there’s no longer a reason to situate the ‘loose’ slot machine games close-by any exits.
Yet another standard rule is that loose slot games are located on the major aisles in the casinos, again so that more persons could see winning jackpots and be inspired to play. Notably however, 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 slot machine games.