Of course, were I the manager, this person would be spoken to, at least. Not only will the artist now not buy the coffee (or anything else), he will also not potentially make a habit of coming in every day and buying stuff. In addition, he will also tell family and friends and anyone else who will listen about this incident, causing them to avoid this shop. He might even draw a cartoon about it!
Not in any way taken from real life, I’m sure.
Of course, were I the manager, this person would be spoken to, at least. Not only will the artist now not buy the coffee (or anything else), he will also not potentially make a habit of coming in every day and buying stuff. In addition, he will also tell family and friends and anyone else who will listen about this incident, causing them to avoid this shop. He might even draw a cartoon about it!