T.G.I.F.

Mariachi Flor de Toloache's 2014 self-titled debut album earned a Latin Grammy nomination in the Best Ranchera category — quite an accomplishment, given that the category celebrates an incredibly long tradition of Mexican music. But it was no fluke: The group's members come by their mariachi skills honestly and with endless practice, while still looking for ways to take chances.

Still, the best way to introduce yourself to Mariachi Flor de Toloache is to see it live — something many have don...