Stan and I took the O Chateau wine class yesterday, and recommend it. The sommelier, Justin, was very knowledgeable, explaining terminology, varieties, wines, and regions very clearly and thoroughly. He was entertaining, as well.
We tasted 6 wines, each from a different region of France. Water and baguette slices were provided gratis, and plates of cheeses and charcuterie were available for purchase.
Although their website says class sizes are reduced because of Covid, our group of about 20 filled the small tasting room. That was the only downside of the experience. Well, that, and the group tended to get more lively (meaning loud) as the sesion wore on.
The class cost 69 euros, lasted 2 hours, and covered 6 wines. The wines were good and the explanations were excellent. Recommended.