Singing instrumental music is most important because, while you play an instrument, you are singing through the instrument... actually, you are singing inside.
In my books, women often solve the problem. Even if the woman is not the hero, she's a strong character. She does change the plot. She'll often rescue the male character from some situation.
But I think there's a genuine joy, too, a sense that no matter what, even if my stomach's growling, I'm going to dance. That's what I want to leave people with at the end of the play. After all this, people still know how to live.