For those having any doubt : The songs were in nagpuri (Derived from ChotaNagpur). Our culture teaches inclusiveness. So, in nagpuri dance no one is performer and no one is spectator. Or the more correct way to put this is everyone is a performer. Everyone is same, like a unit. No main dancer or back dancer. (That's why anyone couldn't resist and joined the dance floor). Just enjoy the music and live. In Hindi "ras me doob jao".. so the dancers are called rasik or rasika...