Hi Mick! Those swanky weddings with the colorful shells sound like really something! What a gourmet treasure!
On Cahors, we DO get a lot of Malbec here and years ago it was my favorite grape - and the word on my car's license plate even for a couple years - though now I'm back to my heavier reds, Cab, Amarone, Tannat, Barolo and some of the more autere Bordeaux blends too.
Nonetheless, Malbec was a great bang for the buck pick back then and for the most part still is except for the South American vineyards that have been bought by Americans who added more chemicals and changed the wine.
"Alamos" used to be an easy and delicious "house wine" for nightly gulping - both their Malbec and Bonarda as well. (Argentina). Then, our "Gallo" clan bought it (USA) and it did change! I no longer buy that one but there are numerous others.
In any event, such fantastic posts you've got here! Thank you!!! Cheers! - Leah