FOR a trendy stay while visiting the historic U.S. capital, consider the Aloft National Harbor or Aloft Dulles North hotels. The hotel chain’s core values are sassy, savvy and space. Sassy stands as a contrast to stuffy hotels. Savvy is because all the hotel staff (not just the bell captain or concierge) are knowledgeable of the hotel and city. Space? Well, the hotel’s public areas are just that: extremely spacious and not cramped. The hotel chain provides incentives to join in its sustainability practices. Guests who skip everyday room cleaning receive $5 towards the Re-Fuel station (food) or Starwood points. If you need a little extra motivation while on the go, stop by the Re:charge 24/7 fitness center and download easy-to-execute a-workouts onto your laptop, iPod, iPhone, Blackberry, Treo or other handheld device.