Llywelyn's Pub Overland Park, Kansas
We live right down the street from the OP Llywelyn's. It does a very good happy hour business and is packed nearly every evening after work. All of the food I've tried has been passable to good, but the bar is pretty much what it's all about. The rooms are big and loud and the service is fine.
I have been to 2 St. Louis locations on many occasions and can only say that they are a sloppy copy of a Houlihans. There is little that is Welsh about it and they continuously hire lazy servers. I go for the drinks and live music and skip the food. So unless they have a miracle partner, save the trip and stick with the better choices in Overland Park.