A karaoke establishment made up of private rooms that can be rented — places where groups rent a room to sing and often eat or drink.
週末に友達とカラオケボックスで6時間歌いっぱなしだった。
I sang non-stop for six hours at a karaoke box with friends over the weekend.
カラオケボックスは個室なので、周りを気にせずに歌えるのがいい。
The good thing about karaoke boxes is that you can sing without worrying about others because they're private rooms.
駅前に新しいカラオケボックスがオープンした。
A new karaoke box opened in front of the station.