Where did "Barber Shop" quartets get their name?

I’d hit the edit if I were you quick.

Whoopsie, didnt catch that, @ucme ! Thanks!

@Arp No problem!

“A barbershop quartet is a musical quartet which performs barbershop music. This form of music dates back to the 1600s, and it evolved, as you might suspect, form casual gatherings of friends in barbershops and other public places.”

Source

As a former member of the Society for the Preservation and Encouragement of Barbershop Quartet Singing in America, I can tell you that the goal in Barbershop Quartet singing is not only four part harmony but to create ringing chords (overtones and undertones) throughout to performance the creates a distinctive experience for the listener. The songs are typically sweet and sentimental but the musical effect is quite something when the arrangers skills and the singers’ skills combine to reproduce the desired effect.

SPEBQSA supports both Quartets and Choruses of singers who enjoy the music and the fellowship.