Vision: Dancing in a ballroom: a fun-filled social event will lift your spirits. Seeing a large auditorium: you will have to deal with many people. Participating at a conference: you will be asked to solve a conflict.
Depth Psychology: Since an auditorium is a place where people meet, the dream implies that you are looking for contact, diversion, and companionship. Was the meeting fun or somber?... Dreamers Dictionary
If you dream of entering a ballroom where people seem happy and the music is pleasant, your attempts to achieve happiness will be successful. Be sure that you keep an open mind about what life has to offer. However, if the ballroom was empty, or unpleasant and dirty, or you were upset by the music or the people there, then your dream signifies financial troubles and/or arguments with authority figures.
If everyone in the ballroom was waltzing in unison, you need to get in touch with your inner spirit.... My Dream Interpretation
Dreaming that you are on the floor, dancing in Ballroom style indicates a deep inner grace and sends the message to trust yourself more. Your life is unfolding as it should and any changes that you desire to make will potentially go well at this time. Having faith in yourself is sometimes the hardest task of all but a dream of ballroom dancing signifies that you have every reason to, as you are naturally moving with the flow.
To dream that you are clumsy on the floor indicates that you may be feeling over anxious about your next move and need to relax and let yourself take the next step despite your fear.... Dream Symbols and Analysis