Spectacular service and world class gym
This is the best place to stay in DC even though it lacks a reliably first class restaurant. The staff is uniformly excellent: friendly, correct, completely service oriented. 
The rooms are nicely appointed and have great beds, perfect linen. Bathroom is spacious and has very nice amenities.
The gym is world class by any standard even if there is a modest cost for using it.
Strongly recommend the Club level. While in most hotels this is a kind of sham at the Ritz, there is a real breakfast, nice mid-day treats and wine in the late afternoon. 
It is expensive and definitely worth it.