Originally Posted by Ethan Winer
A room that small should be made mostly dead. Small room "reverb" sounds lame, as you've discovered. If you make the room dead you can then add much better sounding reverb as an effect when mixing.
--Ethan The Acoustic Treatment Experts
You can also add the reverb in after if you have decent monitors and AD By:
placing a room mic or stereo pair in a good sounding open room and playing your tight drum mix back in that room through some decent sounding monitors.
then mix that in as if it was a room mic during the original tracking
I know some big expensive studios that do it
Different strokes for different folks.