![Winchells donut house](https://cdn.statically.io/img/static.wikia.nocookie.net/memoryalpha/images/d/d5/Winchells_donut_house.jpg/revision/latest/scale-to-width-down/180?cb=20050827012109&path-prefix=en)
A sign advertising a coin operated laundry
A coin operated laundry was a facility where clothing could be cleaned for a fee of coins.
In 1986, there was a coin operated laundry next to Winchell's Donut House in San Francisco. (Star Trek IV: The Voyage Home)