Over the past few years we have seen the billboard for Two Frogs Grill on our way to or from Oklahoma City. This is a picture of two smiling frogs tied together. This billboard gives no hint as to what, exactly, the Two Frog Grill is. I was expecting either a home style place like Cracker Barrel or maybe an S&M club with a lot of leather and chrome. Turns out that the Two Frog Grill is a blues club, or at least it seemed to be the day we were there. There is a small stage and the walls…