Mariachi Jalisco, especially in a region called Los Altos. After the Revolution, the charreada became a national sport in Mexico and rings were constructed specifically for them, followed by professional charro associations. With the breakup of the large haciendas, charros were no longer economically necessary but were used as a cultural ideal, especially by the film industry in the mid-20th century. The first charro movies date from the 1920s, but the first to sing mariachi was Tito Guízar in "Allá en el Rancho Grande" in 1936. The character was played by Jorge Negrete in films such as "¡Ay, Jalisco... no te
Mariachi problems recruiting mariachi instructors as many of these do not have required teaching credentials. For this reason, schools often hire trained musicians from outside the mariachi tradition. Many traditional mariachis are concerned that standardization will lead to fossilization and restrict improvisation. Other innovations in the United States have been the incorporation of styles of artists such as Elvis Presley, Freddy Fender and Glenn Miller, as well as the heavy-metal Mariachi band Metalachi. Another is the encouragement of female mariachis including all-female Mariachi groups such as Mariachi Mujer 2000 and Mariachi Divas de Cindy Shea. Mariachi Mujer has performed with Mexican