楽がく屋や口ぐち

noun

stage door; dressing-room entrance

Refers to the entrance to the backstage area, especially the dressing rooms, in a theater or similar venue.

• 楽がく屋や口ぐちで出しゅつ演えん者しゃを待まつファンがたくさんいた。

  There were many fans waiting for the performers at the stage door.