This is where your Grandmother stays in DC. Tired, old and a complete rip-off!
After staying at an Aloft brand hotel in Brooklyn (amazing), I went to DC.
I mean, it's a Hilton, how bad can it be?
First, no parking. Fine. Car in the garage for 39 a night. Off to the room. Our medium-sized dog was 50 extra a night. Fine. Tried to the use the Internet. 36 for three days. Plunked down for that. 
Next day, the Internet wasn't working. They were going through an upgrade for the week. There was Internet, in the lobby, where everyone huddled around their computers like it was a youth hostel. No word about a refund for paid Internet, and the front desk looked perplexed when I politely suggested this. Disgusted, I went to use the gym. 10 a visit.
As the hotel is so poorly laid out, I skipped it. It's nearly a hike from the elevators to your room, and a mission to find the health club, so little point in throwing 10 down the Hilton hole.
Incidentally, Aloft (in New York, which is never cheap) was cheaper, incredibly cool, had killer Internet speed for free, cool Scandinavia design with dance music in the elevators, allowed pets for free, and even gave him a welcome bag of treats. 
The Washington Hilton is dated, the service is poor, and for the price, you can find much better, with more interesting services and design. The brand is sad and dated, much like the Washington Hilton.