Books have been said on this issue, and the bickering and squabbling about where the "hot" slot machine games are positioned in a casino are still ongoing – more than sixty years after slots were 1st placed in casinos.
The quintessential rule is that the better slot games were installed just inside the main entrance of the casino; so that casino fanatics passing by would be able to see jackpot winners … be influenced to come inside … play. Our sentiment is that this is no longer true.
The majority of the big name casinos today are monstrous complexes and you can no longer see inside from the sidewalk, so there’s no longer a reason to place the ‘loose’ slot games near to any entrances or exits.
Another traditional rule is that loose slots are placed on the major aisles inside the casinos, again so that more people could see winning jackpots and be galvanized 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!
Nowadays, casinos are constantly changing their philosophy about where to place the loose slot machines.