hey there Kim, oops.....i was mistaken in my hostels.....the hostel with the cool bar where i ended my pub crawl was Euro Youth Hotel, it is to the right of Jaeger's, and 2 hostels down from Wombat's. but again, with 3 hostels next door to each other, there will be a lot of intermingling.
as for the castle, i grabbed a small flyer in the lobby of Jaeger's for an organized tour to Neuschwanstein Castle. i also looked into a round trip train ticket if i wanted to go there on my own, and the organized tour was actually cheaper, and heaps of fun. there may be a line up, but the guided tour inside the Castle is only 1/2 hour; really quick, and you can only wander in the gift shop or cafe once you are done. cannot explore on your own. to be honest, getting to the Castle (up through a mountain and forest) and seeing it from the outside is actually better than the castle itself, but i still recommend it.