The cafe / restaurant is actually called "Cafe Libro"; although the sign does say "La Era De Aquario" in big text that seems to the be name of the health food store downstairs. Note that while they're theoretically open until 8pm they sometimes close early if business is slow. Still, this is one of VERY few vegan-friendly dinner options in Bogota, so we checked it out. They had a couple of options, but highly recommended the tamales so we both got them. They were OK; pretty bland but once we got some hot sauce for them pretty tasty. Definitely filling and cheap, and the health food store downstairs has some good snacks. The street it's on is really busy and has lots of street vendors selling interesting things out front.
The location of this restaurant as shown on the map is incorrect. The actual location is 4.60583, -74.07198, on the north side of Calle 19, between Carrera 7 and 8 (closer to 8).