I am not speaking for Magico. I am speaking from my own experiences with again, 25 years of doing trade shows, and most of them disc-jockeying a room.
For example-
There are <10 people in a room, you take a request from someone and they take the iPad and select a 17 minute classical track that takes 7 minutes to unfold. Eight of the people out of the ten leave the room. 10 other people walk in look around and walk out during the 17 minute track.
Or you hand the Ipad to someone and they select a terribly recorded hip-hop track. Half of the room gets up and walks out.
Or your requestor puts on an obscure 80's disco track. He bops his head. Others leave the room.
It's not the specific tracks of types of music that is controversial, it happens to be an inappropriate track that works for the specific listener but unfortunately does does not appeal to mostly everyone else. I like to play selections which allow any type of visitor can get a sense for what the system that is being shown sounds like.
I will take my chances at shows with playing selections that can appeal to the majority of visitors. We are always open if someone has specific selections that they would like to hear to have them stop in before or after the normal show hours. This is done almost every day of a show.
I will take my chances at not playing "Russian Roulette" at shows, although different vendors handle the situations in a total different manner. I am not saying that my method or the method of other vendors which are demonstrating at shows is right or wrong, I am just giving my experience and some of the reasons that I chose to operate in the manner that I have in the past and will in the future.
On the flip side visitors that offer selections, which I personally make exceptions for at times, do provide great sounding tracks that are also very good music selections and appeal the masses. Again, Russian Roulette and I chose to take the path that works for me.
Come and find me at Munich, would enjoy meeting you if you are attending.