Try this with your friends. Set a theme (eg. a specific grape from different countries) and each brings one bottle unknown to the others. Blind taste all the wine and establish the country, with reasons. The purpose is to prompt lots of serious thinking round the table. This is a good way for wine lovers to think about the difference of wines from different countries, and surprisingly, even amateurs could come up with some reasonings! This is definite a good exercise for those in the WSET courses!
I tired this recently (Cabernet Sauvignon from different countries) with a few friends and it was both entertaining and educational - because some forgot what wine they were supposed to bring. So we ended up having:
Australian Coonawarra Cabernet Sauvignon
Chilean Cabernet Sauvignon
South African Stellenbosch Shiraz (should be Stellenbosch Cabernet Sauvignon)
Marks & Spencer South Africa Cabernet Sauvignon, HK$90. (should be xxx country Cabernet of about $200!). This was the wine that made the whole exercise fun (or put it upside down?)