Brilliant aint it?
I thought so too!
I lived in SF years ago, in the Mission District, which was a mixture of Irish, Hispanic and Italian families. The Italians had stuffed vines into their backyards and made the maximum wine that could legally be produced (200 gallons).
Once or twice a year, there would be a period when you could go along the streets off of Mission and buy wine from the garages of these families, who used their garages as wine cellars. You had to bring your own jugs and there was always a line because the wine was very cheap and also very good. Only red wines, if I recall correctly, and we all had our favorite garages. It was actually called garage wine.
There was a company (Cribari?) that used to send its tanker truck and buy up the remainder of the wine that didn’t sell on the garage sale days.
I doubt that this has happened in SF for decades, but it was wonderful when it was there!