karaoke; singing to a recorded accompaniment (usually with friends at a karaoke box or bar)
週末は友達とカラオケに行く。
I go to karaoke with friends on weekends.
カラオケで好きな歌を歌った。
I sang my favorite song at karaoke.
彼はカラオケが上手だ。
He's good at karaoke.
最近はカラオケボックスで個室を借りる人が多い。
Lately many people rent private rooms at karaoke boxes.