Books have been said on this topic, and the bickering and disagreement about where the "hot" slot machines are installed in the casino are still taking place – over sixty years after slot games were 1st added to the gaming floor in the casinos.
The traditional rule is that the very best slots were located just inside the main entry of the casino; so that casino fanatics walking by would see actual jackpot winners and be infatuated enough to come into the casino … play. Our standpoint is that this is definitely no longer the case.
Just about all of the large casinos these days are magnificent complexes and now you can’t see inside from the sidewalk, so there’s no longer a reason to put the ‘loose’ slot games close-by any entrances.
An additional traditional rule is that loose slot machine games are positioned on the major aisles inside the casinos, again so that more potential gamblers could see winning jackpots and be influenced to play. Importantly though, 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 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!
Today, casinos are constantly changing their philosophy about where to place the loose slot machines.