Dreaming of an arena or auditorium represents the drama that you are playing out in your life. It could also indicate an event, transformation, playing out, etc… that you are witnessing either within yourself or within others around you. Further, dreaming of an arena suggests that whatever you are watching in the arena is an area of importance in your life and something that you would benefit from paying attention to. The number of people in the arena represents the amount of energy you are putting into that situation in your life. An empty arena/auditorium suggests that you are not putting much energy/effort into this area of your life; whereas as a full arena/auditorium indicates that you are putting tremendous amounts of energy into the situation.