Dancing at a disco is traditionally read as release, rhythm and the wish to be seen having fun. Dream books link it to youthful energy, nostalgia, or a need to let your body lead for a while.
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.