Well, I generally don't use guidebooks and can't really remember any precise names or locations.

In China, these places are easy to differentiate as they will not allow you to buy a single cup of tea without the buffet. And the privacy of the booth allows for a perfect lazy afternoon chat or biz talk.

As for Korea, the main tea growing area is Southern Cholla Province, also famous for it's food, so maybe in the cities there (Yeosu, Mokpo, Gwangju etc.0