Ashland, just south of Division
The tacos at La Pasadita were voted 2nd best in Chicago last year. I recently had a late-night visit there (they are open until 3 a.m.), and I fully agree with the voters. There are three of these little taquerias on the same block - do yourself a favor and go to the one on the east side of Ashland...stuff just tastes better there. Here's all you need to get to be perfectly satisfied: 2 steak tacos, no oinion, salsa on the side. The cheese is to die for and the tortillas are so fresh, you won't believe it. I'm not sure if the tacos taste as good when it's light out, but I'm going to give it a try.
Price: $1.85/taco (one CTA ride is more)
Clientele: Those looking to save themselves from a hangover