Ianto/Jack/Martha
That's fair. I had a couple of friends at uni like that, which I figured out after flatting with them.
Got it. Both places either side of us have one empty spot (M: Jessica Jones, Trish Walker, Maya Lopez; O: Prue and Phoebe Halliwell, Paige Matthews), a couple rooms down one way has three empty spots (L: Five) and the other direction has two (R: Magnus Chase and Samirah al-Abbas). There's a few others that have one empty space, mostly if you want to live with Weasleys and Potters from the look of it.