Carhops usually work on foot but sometimes use roller skates, as depicted in movies such as American Graffiti and television shows such as Happy Days.
[1] Women soon replaced male carhops during World War II, because most American men left their jobs to join the military and restaurant owners quickly discovered that a pretty girl sold more food.
During the mid 1960s, as newer drive-ins began offering inside seating and drive-through service, the number of carhops declined dramatically and they are seldom seen today.
Carhops can still be found at a few remaining original drive-in stands and nostalgic fast food establishments, mostly in smaller and rural towns with local ownership.
Later in the film, when Maurice McDonald is telling of the advent of his titular restaurant, he says he and his brother laid off all their carhops due to said issues, superseding them with the Speedee System where customers were better served.