Dancing danzón at Plaza de la Ciudadela.
Danzón was very popular in the Gulf Coast state of Veracruz, Mexico, because of the strong Cuban influence in the region. Later on, danzón developed in Mexico City, especially in the famous Salón México; in fact, it has survived as a dance longer there than in Cuba. Danzón also flourished in the city of Oaxaca, and many famous danzones were composed by Oaxacan musicians such as the famous Nereidas and Telefono de larga distancia, both works of Amador Perez Dimas, from the town of Zaachila, near Oaxaca city.
Today, people are still dancing the danzón in Mexico, particularly in
the main plazas of Veracruz, Oaxaca and Mexico City, and in yearly
festivals across Mexico. The dance had a second revival in the 1990s,
especially amongst Mexico's senior citizens. Owing to the popularity
of the piece Danzón no. 2 by Arturo Márquez (b.1950) it has been
called the second national anthem by some.
(taken from wikipedia)