Mexican Equivalent of Devon?

Hey guys! I have some friends in town and want to show them some good cheap authentic Mexican food. We went up to Devon and they were very impressed with that street for Indian. I was wondering is there any street just like Devon, but for Mexican food? I know a couple good places on 18th street but that is very sparse compared to Devon. There has to be a street where it is like stepping into Mexico, complete with restaurants, et al, kind of like the Mexican equivalent of Devon Street. Also if you have any good recommendations it would be appreciated. Thanks for your advice!>