Murphy's calls itself a steak house, but to us it looks more like a diner: counter and stools, bare-tabled booths, and a staff of superquick waitresses who git 'er done. The menu does include steaks, and those that we've seen on other people's plates look huge and good. Nevertheless, it's not for steak that we recommend a visit to this 1940s-era eatery just east of the Osage Indian reservation. It is for a hot hamburger.