The three industries that prospered in the Great Depression, I read once upon a time, were:
Bicycles: because it was an inexpensive alternative for personal transportation compared to automobiles in an economy that was more urbanized than its parents.
Education: obvious for the same reasoning used today for workers displaced by technology.
Entertainment seems less intuitive to me. The 1930s was when talking motion pictures really took off. The Jazz Singer release in 1927 made the world safe for talkies.