Multiple selected objects share same rot. axis?

[Adny]

The first that comes to mind is making the entire room one combination by highlighting everything in it then pressing B. That will make it so it will rotate is if one object, instead of each individual object rotating. The only problem with that is when you try to highlight a lot of things at once the editor tends to lag quite a bit. To me that seems like the only solution, but you could always move everything around piece by piece