Fill Up the Room was created on 2007-10-23.
Light can fill a room without taking up physical space.
It can be light,sound,gas and air
In the Room Up There was created on 2009-03-06.
its the bronchiole
"...at that moment you're not there to take up space, you're there to fill the room." -- Verizon TV Ad (Oct 2010)
Up in Mabel's Room was created on 1944-04-07.
Sittin' Up in My Room was created on 1995-12-18.
air or water
How about air, or an odor, or sound.
Fill Me In was created in 1999.
midgets
because gasses always fill up their container.