Those were three rather diverse locations listed in the ad below: super market, custard stand, and gas station.
I've tried to find out what they were, but so far, I haven't found anything. Were they vending machines of some kind? If you know, please leave a comment below.
|Automatic Milkmen ad,|
Meadow Gold Dairies of Beaver Valley,
Beaver Valley Times,
July 1, 1955