"Don'ts for Dancers" by Karsinova (1925)
Inspirational tidbit from this hilarious 1925 handbook: “Don’t say your dancing days are done. Your dancing days are never done until you are confined to a bath chair for exercise. If you can walk to the office in the morning and play a game of golf on Sundays, there is no reason why you shouldn’t foot it with the best every night of the week. A man is only as old as he feels, and, under proper conditions, dancing is such a wonderful rejuvenator that there is no reason why anyone should feel old at all. Moreover, don’t forget that dance is a splendid anti-fat. It will cure that middle-aged spread you are getting so alarmed about.”