My apartment is a large 3 bedroom apartment which I share with 2 roommates. My room is about 15ft x 10ft and features a closet, dresser, desk and queen size bed (Casper mattress), and a lot of windows which let in a lot of natural light.
Neat, and clean is preferred. Some noise discipline after about midnight is also suggested, but depends on who is home. A lot of the time the guest may find themselves home alone.