I was one of performers recently for the Warren Relay For Life. I felt the organizers this year were very disrespectful of the talent they had booked.
When our group performed, the soundman refused to turn off the canned music. I noticed that other acts also were treated in this manner.
I don't think they understand that we like to be heard and also not be distracted by a competing sound. I think an apology is in order if they expect live acts in the future.