I, too, have enjoyed an adult beverage in each of the World Showcase Pavilions. My husband even made us lanyards (he copied much of the text from the internet somewhere) to wear. In each country we had the server sign their name (it looks really neat, especially with the Japanese and Chinese characters).
They actually looked quite official - if I have time, I'll scan them and post the pictures. We had several people ask if we were on an official tour, or where we bought the lanyards. The front said something to the effect, "We are drinking a beer in each country. If you find us looking disoriented, please direct us towards the International Gateway so that we can stumble home to the Beach Club."