In the early decades of the 20th century, these brothers used to practise their music where their father used to work. They gave rise to a new musical genre, which, although not very popular has been referred to very frequently on American TV and other forms of entertainment.
Answer in comments.
Answer: Barbershop Quartets.
Cracked by Rosh and the flightless one
Lovey’s String Band introduced the genre Calypso
barbershop music
Barbershop music.