I took a great 2 hour wine tasting course that I bought for 20ish Euros across the street at the Bordeaux Office de Tourisme. I thought it would be really basic, but they are taught by winemakers from the region and it was actually really great. We learned all about the Bordeaux vignobles, and the characteristics of each, and how to taste the wines and distinguish between them based on flavor, color, age, types of soil, etc. It was actually very informative and I will use the knowledge I gained at this course. The teacher had a glass of wine with us afterward at the Bar a Vins downstairs which is not-for-profit and has excellent wines around 2 or 3 euros a glass. Highly recommend that as well!