Ever walk into a barbershop and just listen to the music they've got playing in there? Sounds like its own thing. I'm always curious about it when I go and get my hair cut.
There is a whole genre of music called Barbershop vocal harmony.  It is a cappella style consisting of four parts.
A whole genre of music.. Who would have thought. Wonder why that came about. Do you know the origins of it?
Barbershop music
Barbershop vocal harmony, as codified during the barbershop revival era (1930s–present), is a style of a cappella close harmony, or unaccompanied vocal music, characterized by consonant four-part chords for every melody note in a predominantly homophonic texture. Each of the four parts has its own role: generally, the lead sings the melody, the tenor harmonizes above the melody, the bass sings the lowest harmonizing notes, and the baritone completes the chord, usually below the lead. The melody is not
Barbershop quartet
A barbershop quartet is a group of four singers who sing music in the barbershop genre of singing, which uses four-part harmony without accompaniment by any instruments such as piano, a style called a cappella. It consists of a lead, the vocal part which generally carries the tune/melody; a bass, the part which provides the bass line to the melody; a tenor, the part which harmonizes above the lead; and a baritone, the part that completes the chord with the note not being