Some booths offer beer and others only offer wine.
Off the top of my head I remember beer at these booths: Mexico, Ireland, Italy, Germany, China, Japan, America-town, Poland, Morocco, Australia, and Puerto Rico.
There's also a booth titled Great Beers from Around the World, but they're not really that great and not anything you couldn't order in Rose & Crown.
Epcot does a really bad job of showcasing beers .... good beers, that is. Germany is pretty reliable for some tasty beer and so is Rose and Crown but that's about it. Although I've recently been told that Le Cellier serves Unibroue beers and we can ask nicely for a take-out cup even if we're not eating there. We're going to try that next month and see what happens.