There are preferred rooms in 50’s, 60’s and 70’s. You may call to request any section. The 50’s/70’s is a known glitch on the online checkin screen.
All preferred rooms are in good locations. Personally I would call and request 60’s.
I would recommend d reading the official Pop thread.
This post shows a map of where preferred rooms are located.
Phone number to call is listed in post one of the attached thread.