Books have been stated on this subject, and the disquiet and discord about where the "hot" video slots are installed in the casino are still taking place – 60 years after slots were 1st added to the gaming floor in the casinos.
The traditional rule is that the better slot machine games were installed just inside the main entryway of the casino; so that individuals walking by would be able to see jackpot winners and be enthralled to come unto the gambling floor and play. Our inclination is that this is no longer the case.
Most of the major casinos presently are monstrous complexes and you no longer can see inside from the sidewalk, so there’s no longer a reason to put the ‘loose’ slots close-by any exits.
Yet another classic rule is that loose slot machines are put on the major aisles in the casinos, again so that more persons could see winning jackpots and be roused to play. Importantly 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.