Steak 'n' Shake
Many locations
Indianapolis, IN
all damned night!
Source of tasty 24-hour food, based in Indianapolis but spread across the Midwest and Florida. Charge cards accepted.
My favorite location is in downtown Indianapolis at the corner of Maryland and Illinois streets. Perhaps the most ecclectic group of diners to be found in the city, especially between 1 a.m. and 5 a.m.