Spread the news, and do mention that tinned Guinness is available in Carrefour (and just about everywhere in the world for that matter)
There's a group of Irish guys that purely by chance we have somehow managed to meet up with every year for the last 5 years. Strangely it always seems to be in a bar somewhere!
I can't guarantee it, but I seem to recall them drinking either Guinness or Murphys on draft at the bar in the Auchan complex.