Greenroom (noun)

1. A room in a theater, studio, or other public building where performers or guests can wait before going on stage or on camera.
2. A room for waiting or relaxing, especially one for performers before a show.

Origin:

From the original green room, a room in a theater where actors could relax before or after a performance.

Examples:

1. The actor was waiting in the greenroom before his performance.
2. The greenroom was filled with the cast and crew before the show started.
3. The guests were waiting in the greenroom before they went on camera.
4. The greenroom was a place to relax before the performance.
5. The greenroom was equipped with comfortable seating and refreshments.