Books have been stated on this matter, and the conflict and ruckus about where the "hot" slot games are located in the casino are still rampant – more than sixty years after slot machines were first placed in gambling dens.
The traditional rule is that the better slot machine games were positioned just inside the door of the casino; so that folks walking by would be able to see real jackpot winners and be influenced to come inside … play. Our theorem is that this is no longer the case.
Almost all of the big name casinos presently are huge complexes … it is not possible to see inside from the sidewalk, so there is no longer a reason to position the ‘loose’ slot games close to any of the doors.
Yet another classic rule is that loose slot games are put on the major aisles inside the casinos, again so that more folks could see winning jackpots and be galvanized to play. Importantly though, 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 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!
In recent times, casinos are constantly changing their perspective about where to place the loose slot machines.