The idea is to spark motivation and engage your guests to participate in this most memorable event “your wedding day”.  This may consist of a dance duo, group or solo performance and guests should have plenty of advanced notice to polish their act.  Guests who are on board with this opportunity may then confirm their attendance to participate and be prepared to dazzle.  You may consider rewarding the winner with a prize (not too extravagant) as they are your friends and relatives.  This is a friendly competition by design to make the reception more engaging, lively and a night to remember.