To be dreaming of dancing can mean you are happy. You may be celebrating a minor victory.
Dancing in a dream can also mean you have assumed a different personality. You twirl, glide and make beautiful movements in dance. You entertain yourself, or whoever is watching you. What happens after your dance? What happens after your temporary elation is finished? Your flirtation with a beautiful form of art is over. You return to normality. This dream is a reminder about having to deal with practical issues. A dancer can’t be dancing forever.