Hehehe... I don't think I was necessarily "brave" but okay. And I never did get A) a headache or B) a stomach ache so that's all good.
I've been told by a number of 40+ year old Spaniards that THAT'S how it used to be for common folk, that you could take your own jug, bottle, or receptacle to the neighborhood bodega to get it filled with red wine - and it was cheap! Jazz, do you remember those days? (I THINK you're 40+ years old, if my memory serves me correctly
)
Saludos, MadridMan