Avenida Pueyrredón en route to Abasto 3
This guy has a portable coffee shop although he is just grabbing something below it and barely visible behind it. You can get coffee, tea etc. You see that in more places in the city. They are usually much cheaper than regular coffee places or restaurants. I have no idea about the quality of it because i never tried. In general coffee here is fuerte (strong). A bit like espresso in Europe but then a full cup. I didn't try because i'm pretty particular with my taste of coffee.