Haha... I have a weird habit, as a writer, of subconsciously writing non-canon environments as actual homes of people I know. John and Rodney are actually sleeping in a strange version of my parents' house in this fic, and in Theory of Acquired Characters, John is living in a version of a house I rented for three years. So while, to me, the room layout is very obvious, I can understand how readers wouldn't find it as neat and straightforward unless they happen to have stayed in my parents' guest room.