The thing I remember in the dorms was that there was a silent week. You couldn't play music that was loud enough to hear outside of your room. You had to be quiet while walking through the halls. We had 30 minutes a day where this silent period was lifted and everyone turned on their stereos in a loud defiance of "the man".
The residence halls still have an almost identical policy. All of Dead Week and Finals Week is 23/7 quiet hours. The exception is 9-10pm every night. Technically that hour is just a normal "courtesy hour", but it is known campuswide as "Rowdy Hour" (or "Loud Hour", in a few places). People take that to various levels, but it's generally a study break time, people hang out in common areas, talk, play music, be rambunctious, eat food. My house has always had a streaming playlist of EXACTLY 60 minutes of music, so people can connect their media players to the feed and the same music comes blaring out of 70 stereos and computers simultaneously. It was a thing of beauty.
Incidentally, anyone know how to broadcast a streaming feed over the internet (preferably with iTunes)? I can't figure it out...