Not in the UK from what I can see, there's stories about it in the news but try actually going to hackney on a saturday - it's full of 22 year olds drinking (and also often smashing loads of bag...).

Maybe that's not a representative sample but young people still want to socialise and at that age you can get away with it so why not.

Having said that, the UK is absolutely a nation of pissheads, the US has always has that puritanical streak