Books have been stated on this topic, and the debates and feuds about where the "hot" slot games are placed in the casino are still passionate – more than 60 yrs after slot games were first installed in gambling dens.
The quintessential rule is that the better slot games were placed just inside the entrance of the casino; so that folks going by would see jackpot winners and be stirred to come unto the gambling floor … play. Our sentiment is that this is definitely no longer true.
The great majority of the big name casinos presently are oversized complexes … it’s no longer possible to see inside from the sidewalk, so there is no longer a reason to situate the ‘loose’ slot machine games near to any exits.
Yet another standard rule is that loose slot machine games are installed on the major aisles in the casinos, again so that more persons could see winning jackpots and be energized to play. Notably however, 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 machine 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!
Today, casinos are constantly changing their perspective about where to place the loose slot machine games.