Quite possibly the brand’s most stylish hotel, the Conrad Washington D.C. features architecture by the Swiss starchitects Herzog & de Meuron and interiors by the Houston-based Rottet Studio — a potent pairing that bucks the capital’s conservative aesthetic reputation. The comforts and service are first-rate, as you’d expect from a luxury hotel in this town, and the neighborhood is a lively one — but you’ll be tempted to do your entertaining in-house thanks to Estuary, which showcases the flavors of Chesapeake Bay, as well as Summit, the rooftop bar with panoramic views of the city’s icons.