Yes, if someone is going out to a comedy show or a party or a concert, maybe it is an acceptable comment to offer them.
But is it really the right thing to say to a artist who is going into the studio to work?
Is it a bit of an insult, or is this artist just too thin-skinned? And how is the artist to respond gracefully to such a comment?
What might be the response of a surgeon who is about to operate, a lawyer preparing to defend a courtcase, a policeman, a fireman, an accountant, a soldier, or any member of a dozen other professions? How would they react if someone flippantly told them to “have fun” in their place of work?
Just wondering …