There are about 150 Carnival balls between January 6 and Mardi Gras.  Carnival krewes organize each ball.  There are numerous Carnival krewes, the oldest being the krewes of Rex and Comus.  Most balls are preceded by a parade.  Balls are traditionally an occasion for fathers to present their debutante daughters.  Formal attire is a necessity to attend a ball.  Men wear a white tie, tails, and white gloves.  Ladies wear a long dress, gloves and simple hair ornaments.  Hats are not appropriate.  Balls begin at 9 p.m. and last from 2 to 4 hours.  Masked gentlemen call the ladies out to dance by presenting them with gifts.  A formal dinner called the Queen’s Supper is served after the ball.