This got me thinking about my mom (she used to play Swingle Singers and Switched-on-Bach cassettes in our station wagon). She loved to sing and was an alto in a "Sweet Adelines" group in the 60's. I remember her sewing theme costumes and practicing songs, but quit because juggling time was so difficult. Instead, she drove us kids to piano lessons and swim meets and....

I thought it was a local or regional thing that fizzled out over time, but apparently it's still alive and well. She'd hate the gymnastics and theatrics of today's competitions....but would love the a-capella harmonizing. These women can sing! IMO, it's better without the visuals

https://www.youtube.com/watch?v=ZPJJexs_XmQ

https://www.youtube.com/watch?v=S4cEoL-UQiY

https://www.youtube.com/watch?v=pe9sk2-8uUk