Books have been said on this matter, and the controversy and arguments about where the "hot" slot games are positioned in the casino are still passionate – more than sixty yrs after slot machine games were 1st added to the gaming floor in casinos.
The classic rule is that the more favourable slot machines were placed just inside the main entrance of the casino; so that persons passing by would be able to see jackpot winners … be keen enough to come unto the gaming floor and play. Our reckoning is that this is no longer true.
Just about all of the large casinos nowadays are super-colossal complexes … it’s no longer possible to see inside from the sidewalk, so there’s no longer a reason to place the ‘loose’ slot machines close-by any doorways.
An additional traditional rule is that loose slot machine games are installed on the major aisles in the casinos, again so that more folks could see winning jackpots and be galvanized to play. However, 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 one armed bandits 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 one armed bandits.