Husband and I were in St. Louis a few weekends ago, and I did much reading here before going. We ate well all weekend, felt that we got a good 'cross section' of typical StL foods *and* impressed our local chowhound friend with our picks.
I did find that there was less on StL than other Midwestern cities, though, so I wanted to offer an overview of the places we tried for the next visitors to come along.
Courtesy Diner - the old, original one, at midnight when we landed, for a great, intense patty melt. They did something wonderful with the onions. Husband had a slider (?) the hamburger patties with chili and potatos (I think) and cheese. Yikes!
Imos, because we *had* to try the thin crust/provel pizza. I don't know that I can call it pizza, but we liked it.
Bluebird, for a beer and toasted ravioli and for the history. The ravioli is verging on icky for me, but is good bar food.
Schafly's Bottleworks - this was a find, and we really enjoyed it. We were staying downtown and would have gone to the Tap Room if it weren't for Chowhound ... we split a melt, pan fried corn, mac & cheese and the sticky toffee pudding, and knew that if we lived in StL we'd eat there all the time. The coffee stout and belgian fruit beers were also good.
Uncle Bills' Pancake House - Really, really good banana pancakes. And that odd, creepy & appealing aura of a place that never closes when you are eating pancakes at midnight.
We also had to try White Castle (we're from California, we don't have those) and Steak & Shake. And we brought home a gooey butter cake that we were quite taken with.
So, thanks, StL 'hounds! If you're coming to LA, I can return the favor!