Books have been said on this item, and the conflict and feuds about where the "hot" slot machine games are positioned in the casino are still rampant – more than 60 yrs after the slot machines were 1st placed in gambling houses.
The standard rule is that the more favourable slot machines were positioned just inside the main doorway of the casino; so that casino fanatics going by would see jackpot winners … be baited to come unto the gaming floor and play. Our sneaking suspicion is that this is not so anymore.
Almost all of the major casinos these days are magnificent complexes and you can no longer see inside from the sidewalk, so there is no longer a reason to place the ‘loose’ slot games near to any doorways.
Another classic rule is that loose slot machine games are put on the major aisles in the casinos, again so that more potential players could see winning jackpots and be inspired to play. Notably however, 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 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 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 games.