A ballroom stands for celebration, social grace and being seen. Dancing well is read as harmony with the people around you; standing at the edge as a wish to join in that has not yet found its moment.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.