Volumes have been set forth on this subject, and the disquiet and arguments about where the "hot" slot machine games are placed in a casino are still intense – over 60 yrs after slot games were first placed in casinos.
The standard rule is that the more favourable slot games were positioned just inside the entrance of the casino; so that people walking by would see actual jackpot winners … be inspired to come inside … play. Our inclination is that this is no longer true.
The majority of the major casinos nowadays are colossal complexes … you no longer can see inside from the sidewalk, so there’s no longer a reason to situate the ‘loose’ slot machine games in close proximity to any exits.
An additional traditional rule is that loose slot machine games are positioned on the major aisles inside the casinos, again so that more people could see winning jackpots and be galvanized to play. Nonetheless, we find that this also isn’t 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 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 games.