Once actually, yes. It was actually a restaurant with a live pianist. As far as places that have music go, yes it was relatively subtle and laid back in terms of volume and distraction-factor. I didn't mind it too much. I don't like places with loud music although I've been to them. The piano bar situation was more tolerable than those, certainly, to me anyway.
They tend to just play laid back, easy listening classics and things that sound like the proverbial "tickling the ivories" in a calm casual way, nothing too uptempo or raucous.
This same restaurant was also the night I got the worst food poisoning of my life, hahah! Which is why I recall it so well.