Final answer:
Mariachi groups dress in a traditional Mexican outfit called a traje de Charro, which is emblematic of the charro heritage and is worn to honor cultural traditions during performances.
Step-by-step explanation:
Mariachi groups today, regardless of where they are found, typically dress in what is known as a traje de Charro. This distinctive style of dress originates from Mexico and is closely associated with mariachi musicians. The traje de Charro consists of tightly fitted pants, short jackets, embroidered waistcoats, and bow ties, with elaborately decorated sombreros.
The look is both traditional and elegant, evoking the image of the Mexican cowboy or charro, which dates back to the 17th century. Mariachi ensembles wear these outfits as a way to honor their cultural heritage and to be visually distinctive during performances.