Volumes have been set forth on this subject, and the controversy and arguments about where the "hot" video slots are placed in a casino are still there – over sixty years after slot machine games were first placed in gambling houses.
The standard rule is that the very best one armed bandits were located just inside the main foyer of the casino; so that people passing by would be able to see real jackpot winners … be captivated to come into the casino … play. Our presumption is that this is not so anymore.
Many of the big name casinos nowadays are behemothic complexes … you no longer can see inside from the sidewalk, so there is no longer a reason to have the ‘loose’ one armed bandits near to any exits.
Yet another traditional rule is that loose one armed bandits are positioned on the major aisles inside the casinos, again so that more fun seekers could see winning jackpots and be motivated to play. Notably though, 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 slot 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!
Nowadays, casinos are constantly changing their philosophy about where to place the loose slot games.