Books have been stated on this matter, and the disquiet and interchanges about where the "hot" video slots are located in the casino are still taking place – over 60 years after the slot machines were first placed in casinos.
The classic rule is that the better slot games were located just inside the main door of the casino; so that folks going by would see real jackpot winners and be attracted to come inside and play. Our slant is that this is definitely no longer true.
Most of the major casinos presently are immense complexes and it’s no longer possible to see inside from the sidewalk, so there is no longer a reason to have the ‘loose’ slots close to any entrances.
Another standard rule is that loose slot machine games are put on the major aisles in the casinos, again so that more people could see winning jackpots and be inspired to play. 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 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 perspective about where to place the loose one armed bandits.