asvjerry
I had a room at the RMAF for about 10 years. When the room was not that busy I was happy to play a cut off of a guests CD. In general I preferred to play music that I knew would show just how good my system was, with high degree of transparency, great sound stage and very natural sound. As an example:
" Nothing I heard at RMAF.. could touch this rig for sheer midrange purity, detail, three-dimensionality."
Chris Martens The Absolute Sound
The problem with playing music that someone brings in my room is that it may sound very ordinary.
I would not recommend just walking out of a room that won't play your CD for you. I would suggest that you first listen to the setup and if you like it, stay for a while and if you are still interested speak with the exhibitor and express your interest, tell him you really like the sound and wonder if he would mind play a track for you.
Just a thought.