Do you really want to defend your answer by comparing an ATM to a slot machine and why it should be placed in public spaces soon? I guess you are not getting it. I have already mentioned that it's not viable. Just think about it: slot machines were invented in 1894, and if it were possible to place them in areas where you think they should be, that would have happened a long time ago.
The first was invented in
1895 not 1894. And if you read your history properly you will find out that these machines were popular in Saloons.
A simple google search states that slots were existing even before 1894 according to the article it was around 1887 when the Liberty Bell slot machine was invented by Bavarian-born Charles Fey in San Francisco, California
[1], but one that was invented in a modern sense was in 1894 so I think Japinat is right about saying it was invented in 1894. For supporting details we can check this facts:
The Liberty Bell slot machine was invented in 1887 by Bavarian-born Charles Fey in San Francisco, California. This gaming machine simulated the table card game of poker, having three spinning reels each with five symbols: diamonds, hearts, horseshoes, spades, and an image of the Liberty Bell.
The first slot machines in the modern sense were invented by Bavarian-born American inventor Charles August Fey, at the time a mechanic in San Francisco, who built his first coin-operated gambling machine in 1894. The following year Fey built the 4-11-44 in his basement; it proved so successful at a local saloon that he soon quit his job and opened a factory to produce more units.
The demand for slot machines quickly grew, with Charles Fey's design becoming highly popular in saloons.
So, talking about areas where you think the slot machine should be you can see that the casino was not the original place the slot machine was, it started in a public place, a saloon.
Indeed this happened a year after when the first slot machine (in the modern sense) was invented. It was stated that the 4-11-44 which was built a year after was the one that became popular in saloons.
Also, modifications have been made over time on the machine, I see no reason why more modifications cannot be made on it to suit public places.
Modification is not an issue here but the legality. Provider can modify their slot games as they wanted but they must comply to the regulations and if they wanted to deploy their slot machines in public then they need a proper document and license for that.