In answer to the "One place you would take people form out of town" for me, right now, I would say Zaytinya in the Penn Quarter, which has been much discussed in various threads on here. More for dinner although you can make a light weekend lunch out of the small plates there (easier to get a table, also). ANd the atmosphere definitiely makes it an "occasion" type of place. Like Steve, I really like Majestic as well, although I have never had brunch there, only dinners. Although I have never been there, I have had friends say good things about the brunch at Gabriel off Dupont Circle.