Candela,
I never made it to a studio while I was there (brought my own mat with me to practice), and the only two places I came across by chance were closed. This may have been either because of comida time or because it was August and everyone was on vacation.
Anyway, there was a good handful of yoga studios listed in the phone books.
If you attend any classes please post when you get back.
Thanks and good luck
Churrito