Is a painting of people dancing expressionism?
For expressionism, it is not what you paint, but how you paint. People dancing can be illustrated within the rules of many different art styles. For expressionism, what matters is the tendency of an artist to distort reality for an emotional effect; it is a subjective art form. To make a painting of people dancing be expressionism, you must somehow paint the image in a not quite realistic way. How you do this depends on the emotions or message you want to send. You might try googling images of expressionist artwork. My source article below has several examples.
