Being a huge fan of vinegar, I recently wondered if there are any actual known cocktail recipes/drinks that involve vinegar as an ingredient, preferably as a significant ingredient contributing perceivably to the drink's taste.
While there are drinks with a more spicy/hearty flavour, like Bloody Mary, I never heard of a cocktail involving vinegar and wonder if it would even work together with alcohol from a flavour-perspective. I could imagine the best targets to be spirits with a rather low-profile taste of their own, like vodka.