The traditional quinceañera dance is usually called a waltz.
A formal waltz is commonly performed by the celebrant with her court or family members during the reception. The dance gives the event a ceremonial centerpiece and allows relatives and attendants to participate in a choreographed presentation.
Quinceañera waltzes are often rehearsed in advance, particularly when several dancers are involved. The music may be a traditional ballroom piece, a contemporary song arranged for a waltz, or another selection chosen by the family. Some celebrations add a second, livelier routine after the formal dance.
The waltz is customary rather than compulsory. Modern quinceañeras may feature pop, regional, hip-hop, or other choreography, and some omit a formal dance entirely. Calling it the traditional waltz distinguishes the older ceremonial format from the increasingly varied dance programs seen at contemporary celebrations.