I used to work in that area for a few years and now that I've moved close to Union Station, I still go back to the Lincoln House and Waffle Shop for breakfasts and lunches.
These places are not fancy and the food is good, basic and portions are generous. Prices are reasonable. I think these two places would be worth a try. The items are too numerous to mention here. Chinese food is available at Waffle shop. Try the vegetable lo mein with chinese pepper sauce!