There were also automats, automated restaurants serving all food through a vending machine (or more accurately, wall). Classically all for a single fixed price (a nickle).

These are featured in several cultural references, such as the 1962 Delbert Mann film That Touch of Mink, and PDQ Bach's "Concerto for Horn and Hardart" (being named after a prominent New York City automat chain).

Mink: <https://yewtu.be/watch?v=Y3GXMB4VPY8>

Concerto: <https://yewtu.be/watch?v=NT6bxlnS1Is>