The Fitness Center at Park Hyatt Washington D.C.

"The hotel has an indoor pool and a fitness center"

"There is an indoor sky-lit swimming pool and whirlpool, a 24-hour fitness center featuring cardio and weight machines, and conference and banquet facilities covering 12,000 square feet"

"For more active types, the hotel’s loaner bicycles are great for a spin along the nearby waterfront; and the fitness center (open 24 hours) is head and shoulders above a standard hotel gym, with huge windows that flood the room with natural light"

"This pet-friendly hotel also boasts a spa, fitness center, indoor pool, and rain showers in the limestone bathrooms"

"The indoor saltwater pool with a well-furnished, naturally lighted deck is a bit smaller than the one across the street at the Fairmont, but the state-of-the-art fitness center is just as nice, and is open 24 hours (the one at the Fairmont closes at 10 pm)"