One of several WWII photos from The Atlantic:
Through bombs and sirens, the Windmill Theatre carried on providing music, revue, and ballet performances for the people of wartime London. The artists sleep on mattresses in their dressing rooms, living and eating on the premises. Here, a scene behind the scenes shows one of the girls having a wash while the others sleep soundly surrounded by their picturesque costumes, after the show on September 24, 1940, in London.
If the Windmill Theatre sounds familiar, it was the setting for Mrs. Henderson Presents — on my favorite films!