I sing barbershop, I never cared for barbershop, but I sing barbershop, and that's my weakness now. Tried it once for a birthday party stunt - most fun group thing I've ever done, and certainly the most challenging!
I suspect there'd be a lot more of it if more high tenors existed, but we were very fortunate in having one in our morris team, as well as the other essential, a first class singing teacher. Went across to Newcastle once to learn from the 40 strong Newcastle society - they hadn't a high tenor among them and made do with 3-part harmony! Yes, it's a matter of taste, and yes it's all the awful things said thus far - but it's a great laugh, and I never listen to the words of songs anyway, being a strictly tunes person. The harmonies, with the melody line second from top, are just great.