This was also one of the chapters that was in Ala Carte. I still get surprised sometimes about how old/early some of the chapters included in Ala Carte was. I knew that it's a mixed selection, but still.
I also commented this in the previous version, but really, I can't stop thinking of this since I saw the Ala Carte one: I don't know about wine, but based on what I read in Drops of God/Kami no Shizuku, I was thinking Yamaoka probably had the wrong kind of chablis, that's why he ended up with a weird taste.
(Context: "Drops of God" is a wine connoisseur manga, where one of the storylines is precisely "finding the right chablis to go with oysters". The conclusion in the series was that not all chablis can be paired with oysters, and if you pick a wrong type it won't pair well and you'd get that funny fishy taste. I don't know how correct the claims being made in this series were, but hey.)