Dancefloors are a great spot for demonstrating one's dancing ability, movement evenness, sense of rhythm and vehemence, yet usual dancefloors give no way to demonstrate one's musical abilities to the full extent.
My idea is constructing special dancefloors enhanced with convenient pad keys allowing dancers contribute some individual tunes and/or beats to the music playing even without stopping dancing.
Also, every person would feel his/her contribution to performance and add individual improvisations, enriching the music playing with extra beats and melody lines.