To dream of ballroom dancing or waltzing represents harmonious decision making or perfect co-operation. Applying your professional or sophisticated experience that makes a situation feel easy. Enjoying yourself never making a single mistake. Elegant or sophisticated thinking working out well for you.
Positively, ballroom dancing or waltzing may represent feelings about yourself being a "genius." Enjoying seeing your superior skills or experience being applied to a situation perfectly. An area of your life where things are working well and no mistakes are being made at all. A situation is going off without a hitch.
Negatively, ballroom dancing may reflect a lot of stress or anxiety you feel to apply professional or superior knowledge perfectly. Feeling pressure to look good never making a single mistake. Feeling that your reputation is on the line. Alternatively, it may be a sign that you are enjoying feeling too smart to ever get caught with your dishonesty.