Here is the website, yes there are four in Cambodia and one in Laos. Even better, here is their list of unusual restaurants, some examples:
Auction-like sale of dishes (Malaga, Spain)
All staff are midgets (Cairo, Egypt)
Three robots greet guests and take orders (Hong Kong)
Restaurant for anorexics (Berlin, Germany, now closed, more information here)
The same link lists the world's best (supposedly) 24 restaurants.
Here is restaurant trivia in Russian.
Russia House, web site, 790 Station Street, Herndon, VA, 703-787-8880 (Metro Trip Planner - opens in new window) [WaPo | City Paper | food-plan | openlist | Yelp | Gayot]
I drove to this place once, but it looked boring and overpriced. So, I reoptimized and opted for Peruvian chicken in a nearby strip mall, I think it was called Pollo Inka.
See also under Serbian.
Russia House Restaurant and Lounge, web site, 1800 Connecticut Avenue NW, Washington, DC, near Florida Avenue, 202-234-9433, closed Sunday (Metro Trip Planner - opens in new window) [WaPo | City Paper | openlist | Yelp]
Some claim it is excellent, I need to check it out. I love good Russian food, despite its unavailability in Russia. The best places I know are in Helsinki.