I once wrote about my Uncle Harry and how he performed musically in Milwaukee, Wisconsin as "Montana Chubby".
https://licn.typepad.com/my_weblog/2019/08/montana-chubby-john-dunn-consultant-ambertec-pe-pc.html
I also mentioned Uncle Harry's having performed with Concertina Millie who was very widely known and listened to in Milwaukee, but so far as I know, never anywhere outside of that city. Still, she had a long and active career to which a quick Google search will attest:

In the summer of 1968, I was visiting Uncle Harry in Milwaukee and not too far away, in the parking lot of a local strip mall, an utterly enormous tent had been set up with hundreds of folding chairs, a dais at one end with microphones, lights, a piano and lots of guitars and there we were treated to a concert by Concertina Millie herself. The crowd, and yes I do mean crowd, was joyous!!
One of the songs called for audience participation as in "EEE - IIII - EEE - IIII - EEE - IIII - OH!!!!", not the refrain from Old MacDonald but something quite different and that mass of humanity was caught up in it but good.
There were two men seated just behind Uncle Harry and myself and when the number was finished, one said to the other "Man!!! I haven't done that since I was a KID."
I have been to a lot of musical performances over time as in Lincoln Center, Carnegie Hall, Washington Irving High School in lower Manhattan and I've been in a lot of concerts in high school and college glee clubs, the Nashua Choral Society in New Hampshire and, of course, in the Armand Sodero Chorale but I have never anywhere else seen an audience so completely enthralled as that one was that evening in Milwaukee.
It delights me to have the memory.