Volumes have been written on this issue, and the contention and discourse about where the "hot" slots are positioned in the casino are still intense – over sixty yrs after slot machines were 1st placed in the casinos.
The traditional rule is that the most favorable slot games were installed just inside the main door of the casino; so that people passing by would see actual jackpot winners and be intrigued enough to come inside and play. Our presumption is that this is no longer the case.
Just about all of the major casinos these days are super-colossal complexes and it is not possible to see inside from the sidewalk, so there’s no longer a reason to have the ‘loose’ slot machines near to any of the doors.
Yet another classic rule is that loose slot machine games are put on the major aisles inside the casinos, again so that more fun seekers could see winning jackpots and be galvanized to play. Nonetheless, 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 slot 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!
In recent times, casinos are constantly changing their philosophy about where to place the loose slot machine games.