I have asked several listening room hosts about playing unknown music and heard some funny stories about putting on poorly recorded home demos and clearing a room with a punk/thrash/noise band.
I have also run into hosts that enjoy others musical choices if only to get a break from the normal audio show tunes.
One of Paragon's rooms mentioned this--they play music in their demos, not "audiophile favorites." They were playing "Every Day I Write The Book" by Elvis Costello when I visited. And if I never hear that annoying "No respite, no refuge....hummma hummma" song ever again in my life, or obnoxoius female "alternative" vocalists ruining classic rock songs, I'll be better for it.
Even AP's sampler reel was getting a bit long in the tooth, but at least it was better music that I could relate to. I haven't fully jumped down the classical rabbit hole but I must say that the systems playing classical works were the ones that held my attention. Well-recorded small group jazz would be another I'd stick around for. Classic rock? Not quite so much.
Audio Video Interiors totally ruined the Martin Logan
Neolith demo by blaring "The Great Gates of Kiev" at ear-bleeding volume through that bad sounding (IMHO) McIntosh system. Which is a shame, as I really wanted to spend quality time with the speakers. Yes, OK, fine, we get it. They play loud. Really loud. Really
really loud. Only this time, their idiocy had the room 2/3 vacant. This year's sound was so bad I've complained to Martin Logan about it. Last year's setup in this same room had the Renaissance speakers that as I mentioned earlier, sounding similarly strange through this exact same system, but this year sounded completely different driven by Constellation electronics in another room--I spent time in that room both days I was there, since it sounded so much better. And the music selections were way better. They were spinning vinyl on the Continuum Obsidian/Viper combo. And amusingly enough, they played part of "Pictures at an Exhibition" and did not feel the need to play it at an absurd level.
I saw a comment in one of Stereophile's videos ("Thoughts on CES 2017") from one of the review staff, saying that manufacturers needed to "up their game" with the demo music, and I agree completely. I will say that the more friendly rooms would either look up your favorite on their drive, pull it in from Tidal, or play it back from your CD or thumb drive if they were capable. Don't show me what your system can do with a small number of overplayed "audiophile" tracks--play us music we actually buy and listen to.