I am heading to D.C. at the end of the month and I'm looking for two very different types of recomendations. First, I am looking for a mid to upscale place that is comfortable for dinning alone (prefereably at the bar). Second, I am looking for a high-quaility/low pretension place for a group of four. In other words, I am looking for a place that has great food but I am not at all concerned about impressing anyone with the atmosphere of the place. I am staying near the White House, so places in that vicinity would be of particular interest.