Volumes have been written on this subject, and the contention and disharmony about where the "hot" slot machine games are located in the casino are still happening – sixty yrs after one armed bandits were 1st placed in casinos.
The classic rule is that the more favourable slot machine games were installed just inside the main entry of the casino; so that everyone walking by would see real jackpot winners and be possessed to come unto the gambling floor and play. Our leaning is that this is no longer true.
The majority of the big name casinos presently are grand complexes … it’s no longer possible to see inside from the sidewalk, so there’s no longer a reason to place the ‘loose’ slot machines close to any entrances.
An additional classic rule is that loose slot machine games are put on the major aisles inside the casinos, again so that more persons could see winning jackpots and be roused to play. Notably 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 one armed bandits 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!
Nowadays, casinos are constantly changing their perspective about where to place the loose slots.

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