If you are doing a Chili Crawl in the Cincy area you really have to cross the river and hit Dixie Chili. http://www.dixiechili.com/
If you have never been there I think it is the best in the area for its type and I have eaten Camp Washington, Blue Ash, Price Hill and all the others.
Founded in 1929 by Nicholas D. Sarakatsannis, Dixie Chili set the standard for quality food at reasonable prices. "Papa Nick" developed his secret chili recipe using only the highest quality ingredients: 96% Fat Free Beef Chuck, Wisconsin Cheddar Cheese, Bermuda Onions, and 100% Semolina Wheat Spaghetti. He passed the recipe down to his sons — George, Chris, Panny and Spiros — who continue to serve the delicious and nutritious chili Nick served back in 1929, fresh from the kettle, everyday.