Books have been said on this topic, and the disquiet and squabbling about where the "hot" video slots are placed in the casino are still raging – over sixty yrs after slots were first placed in gambling dens.
The standard rule is that the more favourable one armed bandits were placed just inside the main door of the casino; so that fun seekers going by would be able to see real jackpot winners and be challenged to come inside and play. Our assessment is that this is definitely no longer so.
Just about all of the major casinos nowadays are monstrous complexes and you no longer can see inside from the sidewalk, so there is no longer a reason to place the ‘loose’ slot games close to any entrances.
Yet another classic rule is that loose slot games are installed on the major aisles inside the casinos, again so that more persons 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 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 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!
These days, casinos are constantly changing their philosophy about where to place the loose slot machines.