Christmas Markets in Vienna are great. Buy some mulled wine (Gluhwein in German)which is served hot and is quite spicy. The mug it comes in is yours to keep - a great souvenir -but if you don't want it return it and get your €2 deposit back (Pfand).
the eco lodge is SO fun, its kinda like a apartment with about 10-12 ish people in each cabin! make sure you head over to the dingo bar!
It's not really about the drinking, its about having a good time and meeting people from all over the world.