Volumes have been written on this topic, and the controversy and feuds about where the "hot" slot games are installed in the casino are still taking place – more than 60 years after slot machine games were 1st placed in gambling dens.
The classic rule is that the most favorable slots were put just inside the main entrance of the casino; so that everyone going by would see real jackpot winners and be impressed enough to come unto the gaming floor and play. Our feeling is that this is definitely no longer so.
Almost all of the mega casinos these days are titanic complexes … you can no longer see inside from the sidewalk, so there is no longer a reason to place the ‘loose’ slots in close proximity to any entrances or exits.
Yet another standard rule is that loose one armed bandits are placed on the major aisles in the casinos, again so that more fun seekers could see winning jackpots and be encouraged to play. Importantly however, 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 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 slot machines.