Books have been written on this matter, and the controversy and arguments about where the "hot" video slots are positioned in the casino are still intense – sixty yrs after slot machines were 1st placed in gambling houses.
The traditional rule is that the very best slots were installed just inside the main foyer of the casino; so that casino fanatics going by would be able to see jackpot winners … be titillated to come inside and play. Our standpoint is that this is definitely no longer true.
Many of the mega casinos nowadays are super-colossal complexes and you can no longer see inside from the sidewalk, so there is no longer a reason to put the ‘loose’ slots near to any entrances or exits.
Yet another classic rule is that loose one armed bandits are placed on the major aisles in the casinos, again so that more potential players could see winning jackpots and be roused to play. Importantly however, 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 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 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!
Nowadays, casinos are constantly changing their philosophy about where to place the loose slot machine games.