I am surprised nobody has mentioned the Bar Sport for Tapas and basic food. It is clean, friendly and well priced. I eat there all the time and never had a bad exerience. You must try the Garlic/Cheese covered Cod.
Another hot place to eat is Strav. Anyone who knows the TGIFridays chain will recognise this pace. I enjoy the Nacho chicken salad. Do not expect a good wine however.