The Sugar Honey Iced Tea

cello, banjo, ukelele, banjolele, mandolin, concertina, kickdrum/drumasaur, kazoo, and tamborines (yes, plural) with 4 part harmonies

We have been described as female Fleet Foxes, female Beach Boys, and walking in grass with no shoes.

Also, Barbershop Folk

We use the term Folk Do-Wop.