Books have been said on this item, and the debates and disagreement about where the "hot" slot games are located in a casino are still on-going – more than sixty yrs after the slot machines were 1st placed in casinos.
The classic rule is that the superior slot machine games were installed just inside the entry of the casino; so that fun seekers passing by would be able to see actual jackpot winners and be attracted to come unto the gaming floor … play. Our standpoint is that this is definitely no longer true.
The great majority of the mega casinos nowadays are colossal complexes … it’s no longer possible to see inside from the sidewalk, so there is no longer a reason to position the ‘loose’ slot games close-by any doorways.
Yet another traditional rule is that loose slot machine games are put on the major aisles in the casinos, again so that more persons could see winning jackpots and be roused to play. Nonetheless, 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 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 slots.