Volumes have been written on this topic, and the conflict and disharmony about where the "hot" video slots are installed in a casino are still taking place – over sixty years after one armed bandits were first installed in gambling houses.
The quintessential rule is that the most favorable slot machine games were put just inside the main doorway of the casino; so that everyone going by would be able to see jackpot winners and be stimulated to come unto the gambling floor and play. Our opinion is that this is definitely no longer so.
The majority of the mega casinos nowadays are super-colossal complexes … you can no longer see inside from the sidewalk, so there’s no longer a reason to situate the ‘loose’ one armed bandits close-by any entrances.
Yet another traditional rule is that loose slots are positioned on the major aisles in the casinos, again so that more people could see winning jackpots and be galvanized 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 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!
In recent times, casinos are constantly changing their philosophy about where to place the loose one armed bandits.