I disagree with it. If I am conducting a free for all art exhibition (no selling of arts, just for people to see), then the visitors are not my customers. They

I disagree with it. If I am conducting a free for all art exhibition (no selling of arts, just for people to see), then the visitors are not my customers. They are just viewers. I could have advertisers or sponsors for that program and someone could even be paying me based on the number of visitors. That does not make the visitors my customers. On a side note- even if I lose my staff, I lose some chunk or revenue, that does not make my staff my customer.