I could not agree more. Acoustic treatment can dramatically change a rooms ambiance in an almost imperceptible way. It's amazing how voice volume goes down, because the listener can clearly hear you, so you don't have to raise your voice over the other conversations to be heard. Once you experience a well treated room, you long to return to it.

I also have wondered why more restaurants don't use sound treatment. I have noticed that the high class restaurants always have sound treatment. Don't these other restaurants know that if you install adequate sound treatment that you can charge more? Obviously not...