Not so much vinegar... but growing up in the late 70's early 80's, my friend and I would help his father make wine. We're Portuguese, so what else were we supposed to do... Ha!
We would crush the grapes in this barrel setup he had, add sugar to the grape juice... and after some time... I can't recall if it was weeks or months, we / he would then have wine. My friend and I were in our early teens at this point.
But moreso, we would take all the crushed peels and seeds and his father would make moonshine (aguardente) with it. That took what seemed like forever. He had this still in this adjoining locked room in the basement. It was like watching an episode of M*A*S*H or The Dukes of Hazzard... curled copper lines / piping that would literally just drip this clear liquid into a bottle. I think he added sugar as well to that to ferment.
Ahh... the good ol' days.