Back Up Dancers

This spell causes lively music of the casters imagination.  All those chosen within 30 feet of the caster need to make a charisma save or are forced to join the caster in dancing.  Each round at the end of their turn each creature can make another save to remove the effect.  Each turn that a creature has failed the save it must dance and stay within 30 feet of the caster moving at half speed.  The creatures suffer 1d4 psychic damage and 1 level of exhaustion at the end of its turn.  The caster must dance as part of the spell, but may move upto half movement and may act normally otherwise.  The spell ends for an individual if they are attacked, leave the 30 foot radias of the caster, or the caster ends the spell or stops dancing.