Okay, this kind of freaks me out. I start Rhythmbox for the first time, and suddenly a bunch of different peoples' names appear as folders, with music in them, that I can play instantly, as if they were on my computer.

How did I access them at all? o_O I've not requested anything, they were just there.

I live in a apartment complex with other students. Does Rhythmbox go into other connected computers' networks and retrieve their music, or something? I don't get it! Very few people here seem to use Ubuntu, so Rhytmbox must "get" how to retreive those songs somehow.