Free Eco weekend | Guinness is quite a spectacle when you see it being served in a pub, preferably Irish. There you can enjoy the “real” Guinness, which draws 4.2% alcohol. There is also the Guinness Special Export, “Belgian Guinness” in a way, as Carrefour reminds us, because it was created at the end of the Second World War at the request of the Belgian brewer John Martin. This Guinness has, this time, 8% alcohol.