Books have been set forth on this topic, and the bickering and feuds about where the "hot" slot machines are positioned in a casino are still intense – more than 60 years after slot games were first added to the gaming floor in the casinos.
The classic rule is that the superior slots were located just inside the entrance of the casino; so that fun seekers passing by would be able to see real jackpot winners … be attracted to come unto the gambling floor and play. Our standpoint is that this is definitely no longer so.
The majority of the big name casinos nowadays are behemothic complexes and now you can’t see inside from the sidewalk, so there is no longer a reason to situate the ‘loose’ slot games close to any exits.
An additional standard rule is that loose slots are installed on the major aisles in the casinos, again so that more potential gamblers could see winning jackpots and be inspired to play. Interestingly though, 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 slot machine 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 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!
Today, casinos are constantly changing their perspective about where to place the loose slot machine games.