Well I use this board to find recommendations, so I thought that I would share my experiences from my current trip to the DC Beltway (starting specifically the Alexandria Area and up the line to the Pentagon). To my surprise, the recommendations I've gotten from here haven't quite met my expectations.
Lebanese Taverna (Pentagon Row) -- Horrible service, only time in my life the waitstaff didn't ask me if i wanted a drink or appetizer, or dessert. I had to initiate all such requests. While the food was good, it was not as good as the white tablecloth or prices would have made me think it would be. More like a good immigrant run foodstand. Waitress also brought me their bread without the dipping oil, which again I had to specifically request. No refills. Maitre D pointed me to a bad table squeezed between two loudmouth parties (I was alone), again I had to request a much better spot still within the same area. BAD.
Tavernak Greek (Old Town) -- Garden was nice. But my order of the "special", portions of their main four entrees ($16) was a shock in a bad way. Tasted like a good whole foods like deli, well made but sitting under heat lamps for awhile. They brought it all out within 10 minutes, and there is no way they could have made fresh spanikopita that quickly. I can taste the lack of freshness. Lazy, cheap cookery, hiding behind ethnically authentic owners and white tablecloths. Avoid.
Bumblefish (Old Town) -- Went for 'Tart Frozen Yogurt'. Never had it before. They couldn't speak English well, eventually the manager (who still had a thick accent) came to the rescue to answer my question that they were out of the fruit toppings. Oh well--but you have granola? Yippee. To my surprise, even the untopped Tart Fro-Yo was fantastic, finally something for dessert that isn't childishly sweet. Loved it.
Murphy's Grand Irish Pub (Old Town): Ordered Corn beef and cabbage, knowing by experience that simple places make simple things better. A bit unseasoned and bland; Carrots look like they were frozen and then steamed? Desperate for seasoning, I had to request the old salt & pepper shakers, a sign of lackadaisical kitchen work on their part. Despite this it still wasn't bad considering it was cheap. Ok.