Dancing by yourself: indicates that you will be promoted and bring success or love.
Unmarried men dream of dancing, which indicates that they will marry a beautiful wife.
Watching others dance by yourself: It implies that you are full of challenges and ambitious to achieve your goals in the near future, and you should seize the opportunity in the near future.
others dance: if you hide far away and sit in the corner and watch, it implies that you may receive bad news, that is, others have succeeded.