Movies of this time period were produced so people could escape the woes and worries of the Depression. Even though this seems to me a bit ironic as most of the people who were enjoying movies of this time were the more wealthy. It did give them a time to put the worries of the day on hold and let them enjoy a happier go lucky time. themes that you might anticipate from this would be "survival of the fittest" or a bit of jealousy from the two men in the box seats. With the leading lady, perhaps a bit of narcissistic tendencies as she flounced around the stage but in a humorous way. The pre-code view of the musical would have been more vaudeville-esque, as in the leading lady would have been more scantily dressed in her dressing room. The gentlemen's jealousy of the leading lady's attention toward the other man would have been more blunt and might have shown some exchange of blows or harsh words.