There is no pool on property, however you can get a hotel pass to the local gym and they may have one.
This hotel does not have a pool, but there are so many things to do in DC and the DuPont Circle area especially that your time is better spent seeing the monuments and museums that showcase our history and culture. Next door to the hotel is the Tabor Inn - famous for its weekend brunches. Get out and walk the streets; it's your city.
Get an answer from Kimpton Topaz Hotel staff and past guests.