If the service is good, she is very effusive with her praise ... . If she thinks the service is subpar, she proceeds to instruct the server on how to do better

One time we had a young waiter who was in training, and my friend was telling him how to stack up the plates as he cleared the table. I couldn’t help myself and just blurted out, “Please stop.” Should I ignore this from now on?

If “Please stop” did not work, Miss Manners is afraid a more polite approach will not, either. But if similarly pressed, she would say, “Let’s let these servers do their job and just enjoy one another’s company,

In today's Miss Manners column, advice columnist Judith Martin responds to someone who enjoys getting lunch with a friend, but not their friend's critical attitude with servers.