tldr: In the 1950's, doughnut shops were some of the first food businesses commonly open late at night. They became hot spots for police working the night shift

tldr: In the 1950's, doughnut shops were some of the first food businesses commonly open late at night. They became hot spots for police working the night shift since it gave them a place to grab a snack, fill out paper work, or even just take a break.