noun, masculine/maˈɾjat͡ʃi/plural: mariachis
a traditional form of music from the Mexican state of Jalisco; a mariachi band; a musician in such a band; an instrumental ensemble accompanying other types of popular Mexican dance and song
“El bar se llamaba La Camelias y estaba lleno de mariachis y vicetiples.” — The bar was called La Camelias and it was full of mariachis and operetta singers.
Mexican Spanish, often derived from French mariage (“marriage”), because such bands performed at wedding celebrations, but this is debated. See English mariachi.