Books have been stated on this subject, and the bickering and ruckus about where the "hot" video slots are positioned in a casino are still there – over sixty years after the slots were first added to the gaming floor in the casinos.
The standard rule is that the superior slot machines were installed just inside the main doorway of the casino; so that casino fanatics going by would be able to see real jackpot winners and be convinced to come inside and play. Our resolve is that this is not so anymore.
The great majority of the big name casinos nowadays are humongous complexes … it is not possible to see inside from the sidewalk, so there’s no longer a reason to have the ‘loose’ one armed bandits near to any entrances.
Another traditional rule is that loose slot games are put on the major aisles in the casinos, again so that more people could see winning jackpots and be encouraged to play. Notably though, we find that this also is no longer a universal rule.
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 slot machines 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 one armed bandits.