Regular swing not until after WWII? I was taught the "classic" swing when
I was a child in the late "30's and early '40's, by adults who did it
In 1945 I remember attending a village square dance (western Mass.,
Berkshires) where the buzz swing was done by everyone. Since you're in
that neighborhood and report the walk-around swing, we're probably honing
in on the start of buzz-swing popularity. I learned my square dancing in
NYC, so it might have started near there - as a "twiddle?"