An interesting comment I got speaking to an exhibitor is that often it's the attendees that are too timid in their music selections - or bring otherwise god-awful demo tracks. I.e. The exhibitor loves and is dying to hear cool and interesting new music, but often the attendees bring or requests the same old audiophile warhorses, or sometimes brings very weird test tracks that can hardly be considered music at all.
Take away message : don't be afraid to either request or bring "real music" at a show, which includes not demanding play of that weird japanese kabuki music test track you use at home. And of course, being an audiophile event, not that low rez MP3 Britney Spears track either. All else should be fair game.