It's not always easy to find time for a workout during a business trip. This Dupont Circle hotel makes it easier by setting up an exercise bike or elliptical trainer in your room. After your workout at the Topaz, you can soothe your muscles with various in-room professional spa treatments, including a hot-stone massage ($180) or a body wrap ($160). Other healthy touches include a breakfast buffet with soy milk, energy bars, and bowls of fresh fruit.
Cost: $205 a night and up