Baila la Cumbia!

Cumbia is one of the world's great dance grooves. It is made up of merry guitars and accordions, torrid brass, and insistent, deep-toned drums and percussion, pounding out a lopsided, strutting 4/4 rhythm with a kick like nitroglycerine.
-The Rough Guide to Cumbia

It originated in Colombia but this is the music that fills dance halls in Mexico past the onset of darkness. Men with greasy hair and sharp suits. Women with backless dresses and short skirts. All wildly swaying their hips. The music is hypnotic, cowboy music, rural trance.

Here is Cumbia Sobre el Rio from Celso Pina, who is infusing cumbia with modern elements from rap and reggae.