This place is amazing. It's a short walk from our apartment and has an amazing happy hour including cheap guacamole and $4 margaritas. We can spend an hour or five hours here at a time because the environment is so casual, welcoming, and the food is just damn good. Get the lengua or the camaron al mojo de ajo tacos or hongos and rajas con papas if you are vegan.
I probably frequent here twice a week, because I am obsessed with Mexican food, and I'm fortunate enough to live in close proximity to this place. Taqueria Tepango is definitely a sapphire in the rough since there are a lot of terrible/over-priced Mexican restaurants in NYC.