Volumes have been stated on this topic, and the disquiet and interchanges about where the "hot" slot machine games are installed in the casino are still bubbling – more than sixty yrs after the slot machines were first placed in gambling houses.
The classic rule is that the better slot machines were placed just inside the main entryway of the casino; so that persons passing by would see actual jackpot winners … be titillated to come unto the gaming floor … play. Our observation is that this is no longer the case.
The great majority of the large casinos today are magnificent complexes and you can no longer see inside from the sidewalk, so there’s no longer a reason to situate the ‘loose’ slot machines close to any of the doors.
An additional traditional rule is that loose slot games are located on the major aisles in the casinos, again so that more folks could see winning jackpots and be encouraged to play. Notably though, 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 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 perspective about where to place the loose slot games.