I'm in Senior Haus. It might seem scary in the book, but it's really a great place. I'd recommend Senior Haus or East Campus, as they are closest to your classes. Random House is forever and a weekend off campus, and it's a very long walk to classes when it's cold and such. I might have to look into setting up something like that here, as it's annoying to find out if a washer/dryer is open. Good luck again. If I can figure out where to go, I might go get my app, and the comments, but I don't know if I will get around to that.
Offtopic: The MIT parties are pretty wild. People here usually party about as hard as they work, which means they are impressive. During the week, things are quiet and everyone works, but weekends are usually much more interesting. If there's not class tomorrow, you can definitely find at least one party somewhere.