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.