Books have been said on this subject, and the disquiet and arguments about where the "hot" slot games are placed in the casino are still passionate – more than sixty years after the slots were first placed in the casinos.
The classic rule is that the best slots were placed just inside the main entrance of the casino; so that everyone walking by would see real jackpot winners and be attracted to come into the casino and play. Our viewpoint is that this is definitely no longer true.
The majority of the large casinos these days are giant complexes and now you can’t see inside from the sidewalk, so there is no longer a reason to have the ‘loose’ one armed bandits close to any exits.
Another classic rule is that loose slot machine games are installed on the major aisles in the casinos, again so that more people could see winning jackpots and be energized to play. Interestingly though, we find that this also isn’t 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 the slots 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!
These days, casinos are constantly changing their philosophy about where to place the loose one armed bandits.