Chinatown in DC isn’t more than a few blocks long. There’s probably fewer than ten Chinese restaurants there.
Chinatown is centrally located in Washington, and a short walk down to the federal buildings and the Canadian Embassy.
If I have a choice of hotel locations when I’m on business travel, I prefer one next to a Chinese “duck hanging in the window” rice-and-noodles joint. The menu is predictable, and these places survive on repeat business. In Washington, DC, one of the corporate negotiated hotels happens to be next to Chinatown, and a key Metrorail station at Gallery Place. I took the subway from the airport. Coming up from the subway platform, it seems as though the station designers took the Chinese neighbourhood theme seriously.