As an aside,
I typically typically traveled and ate lunch, and often dinner, in all sorts of restaurants for my whole business career. I can think of a number of them that had ceiling construction that caused sound rebounding so that conversations were carried to another table in odd manners.
One in particular, the Bristol, a seafood restaurant in Overland Park, was notorious for this weird sound ricochet. There was a domed ceiling and you could sit five tables away from another table but both under the edge of this dome and the conversation carried more than if that table was next to you. You could hear criminal problems, outrageous business plans and all sorts of things.
You know, for that very reason I never discuss something in public I would not want others to hear.
Just save yourself the trouble, and stick to talk about things that aren’t sensitive for one reason or another.
I am easily amused, and that acoustical anomaly would be a real hoot for a few minutes.
To tell the truth though, I don’t like hearing others talk about something in public that could cost/embarrass them. Makes me uncomfortable. I just don’t want to hear it.