Here's an example how playing any music - even the seemingly inoffensive kind - will irritate people.
A while back, I was in my local Tesco store and they were playing a record by Haley Westenra over the in-house sound system.
Now, Haley has been described as having "the voice of an angel"; however, inspite of that, I overheard a shopper saying "If they don't turn off this caterwauling, I'm going to have to get out of here!"
Well, if "the voice of an angel" gets that sort of reaction, shops really should consider if playing any music is a good idea.