"Don't the Girls All Get Prettier at Closing Time" is a song written by Baker Knight, and recorded by American country music artist Mickey Gilley.
[1] The song is a lament about loneliness and late-night desperation in finding a desirable significant other in a barroom.
As the night progresses, and the singer consumes more drinks, he continuously lowers his standards.
It caught the attention of social psychologists who used scientific testing to investigate whether individuals begin to perceive the opposite gender as being more attractive as it gets later into the night.
The alt-country supergroup The Pleasure Barons included a cover of the song on their Live in Las Vegas CD, with vocals by Dave Alvin.