A new Western Style restaurant just opened up about a month ago in downtown Cheonan. It's called "All That BBQ" and it's located right below the Art Gallery/Coffee Bean, next to the Yawoori.
The basic menu is a salad bar, for 9000-12000 won, depending on when you go. Salad, pasta, good bread, fruit and grilled veggies, rice dishes, soups, coffee, tea are all included. Everything was fresh and tasted great. It was a pretty good deal in itself.
Then, you can add on some BBQ ribs, scallops, shrimp, duck, pineapple or steak. The prices were very reasonable. I had some BBQ pork ribs, which were a generous, meaty portion for about 3000 won. My friend had scallops and shrimp and said they were amazing. Again, about 3000 won for a decent portion.
Draft beer is quite cheap as well.