. Karaoke in China is often called KTV. Some places are high priced and rent rooms for extremely high prices and are a high status way to entertain guests.
There are a number of locations in the Seattle area that can do Karaoke in Mandarin in private rooms (along with other languages)
spotify and search for mandarin
(from wechat group)
Action Go! (Bii)
Event 20190209 SCMB Lunar New Year had some notes