The first dance of the evening is a grand prix, a competition in which dancers compete against each other in four different dance styles. The first round is a waltz, the second a tango, the third a cha cha, and the fourth a rumba. The cha cha is the most difficult of the four dances, because it requires the dancers to bring their feet together at the same time. The rumba is the hardest of the three dances because the dancers must keep the pace of the dance while keeping their feet in the correct positions. The other two dances are more difficult because they require the participants to dance with other dancers who are not as good as they are.