Mexico City Dive Bars

You've just reached one of the best places to find some good dive bars in Mexico City. As a resident of the city, I want you to benefit from a lot of the leg work my friends and I had to do to find great, cheap places to drink with cool people. What's a dive bar? Generally I see it as a place where the beer is cheap, where the place has character but is usually not "trendy", and where a crowd from many walks of life congregates. My friends and I have a few rules in reporting a dive bar. First, the beers have to be equal or less than 25 pesos (about $2 US), preferably much less. Second, the place has to be a legit bar, not a restaurant with cheap drinks. Third, we have to have been there at a time when it was full of cool, fun people or we won't recommend it.
In all reviews we'll try to include a short description, the intersection the bar is nearest to, what the beers cost us, at least one photo, and any other pertinent information, like a metro stop nearby. Enjoy!