RSVP cards can do more than assist you in establishing a head count at your wedding and reception.  They can double to promote the dance party.  Designate a space on the card whereby your guests can request a song they would like to dance to.  This gesture sends the message to your guests that you wish to include them in a fun night of dancing by taking their music tastes into consideration.  The more encompassing you are willing to be with the music, the greater the likelihood your guests will dance the night away.  Your DJ should honor your “do not plays” and should be able to fit in requested songs at the opportune times