The porro is a musical style and dance from the Caribbean region of Colombia. It is a Colombian cumbia rhythm that developed into its own subgenre. It was originally a folkloric expression from the Sinú River area that evolved into a ballroom dance. It is played mostly by brass bands or orchestras, and danced in couples.
This description uses material from the Wikipedia article Porro, which is released under the Creative Commons Attribution-Share-Alike License 3.0.