I've got a 7x15 ft room with 8 ft ceiling. Great sounding drums. Great drummer, me!! I have one end of the room, the end with the drums in it, deader 'n a doornail. The other end has some bass trapping and diffusion along with same crappy absorbtion used to deaden the drum end. I'm using various mic methods. I get very little room sound, even in overheads. I take the tracks thru acoustic mirror and/or Cakewalk's FX3 room simulater dooda. More and more I go with the FX3. It simulates room size, shape, wall material, mic placement, mic polar pattern, and most significantly, the position of the "players". The program allows you to place two "players" at a time via a stereo track. I'll typically do a pass with the overhead tracks (players) "placed" a few feet back from the virtual mics set to cardoid and spaced at 5 feet and 90 degrees. Then another pass with bass and snare in mono up the middle with the same mic placement and the "players" a little closer to the mics. By moving the "players" (where do those quote marks keep coming from?) back into the room, away from the virtual mics, I can then get a large room sound and I use this to sqaush and bring up behind the tracks done with the virtual mics in close.
Reading back that seems a bit of a convoluted description, but, hey.
If I sound like I like this FX3 thing, well I do.
I've never even tried to get a good live sound out of my room. Or into it.