noun
karaoke room; karaoke box
A private room in a karaoke establishment where a group can sing. Often rented by the hour.
週末は友達とカラオケルームで歌った。
On the weekend, I sang with friends in a karaoke room.
Variant with a middle dot; less common in everyday writing.
Wasei-eigo (Japanese-made English) from 'karaoke' + 'room'.