Estudientiles in Santa Maria la Ribera. There are clubs and contests for estudiente groups, and some towns hire them as a tourist gimmick, but these guys are well in the classic tradition of college students throughout history… getting together some beer money the same way Mexican students have since the days of the Royal and Pontifical College.
The Mexfiles has never expected to turn a profit, but personal funds only go so far. Miscellaneous expenses (telephone, internet connection, subscriptions, spyware, hardware repair, etc.) run about 600 pesos (35 US$) a month, and donations are gratefully accepted. Please note that your donations are in Mexican Pesos (18 pesos to the US Dollar as of February 2019). A 25 US$ donation is 450 pesos.
The background of Mexican anti-clericalism and the "atheist" general who led the Catholic counter-revolution of the 1920s 128 pp., Editorial Mazatlán, 2012.
An oral history of the World War II experiences of Gilberto Bosques (1894 – 1997), Mexico 's Consul General in Marseilles, France, who saved tens of thousands from the Nazis. 36 pp. Editorial Mazatlán, 2007 $35 MXP (click the image)
mexfiles.net 
Estudiantinas are big in Guanajuato; there are three competing groups. And, like everything else that exists in GTO, they have a festival for it. Here’s a sample: https://www.youtube.com/watch?v=ZKmk1DcNu1c