Books have been written on this subject, and the conflict and squabbling about where the "hot" video slots are placed in the casino are still happening – sixty years after the slots were 1st placed in the casinos.
The standard rule is that the best slot machine games were placed just inside the main doorway of the casino; so that casino fanatics passing by would see jackpot winners and be attracted to come inside and play. Our persuasion is that this is definitely no longer true.
Most of the big name casinos presently are gigantic complexes and it’s no longer possible to see inside from the sidewalk, so there’s no longer a reason to put the ‘loose’ slot machine games in close proximity to any exits.
Another standard rule is that loose slots are put on the major aisles in the casinos, again so that more potential gamblers could see winning jackpots and be encouraged to play. Notably 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!
Today, casinos are constantly changing their perspective about where to place the loose slot machines.