Books have been set forth on this item, and the conflict and squabbling about where the "hot" slot machine games are installed in a casino are still ongoing – more than 60 years after slots were 1st placed in the casinos.
The standard rule is that the very best slot machine games were located just inside the main entrance of the casino; so that casino fanatics going by would be able to see jackpot winners and be inspired to come unto the gambling floor … play. Our perspective is that this is no longer true.
The great majority of the large casinos these days are massive complexes … it is not possible to see inside from the sidewalk, so there’s no longer a reason to place the ‘loose’ slot machines in close proximity to any of the doors.
Another traditional 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 galvanized to play. Nonetheless, 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!
Nowadays, casinos are constantly changing their philosophy about where to place the loose slot machine games.