Books have been stated on this topic, and the conflict and disharmony about where the "hot" video slots are positioned in a casino are still passionate – over sixty years after slot machines were 1st placed in the casinos.
The quintessential rule is that the superior slot machine games were located just inside the entrance of the casino; so that people walking by would be able to see real jackpot winners … be titillated to come into the casino … play. Our assurance is that this is definitely no longer so.
Almost all of the large casinos presently are giant complexes and it is not possible to see inside from the sidewalk, so there’s no longer a reason to situate the ‘loose’ slot machines near to any doors.
Another classic rule is that loose slot machine games are installed on the major aisles inside the casinos, again so that more people could see winning jackpots and be encouraged to play. Importantly however, we find that this also is not 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 perspective about where to place the loose slot machine games.