I know a restaurant in China, which innovates their service in the division way. People visiting that restaurant are served without a

menu. Instead, when customers sit down, dishes are automatically served in a random way. Once customers see the dish, they could

"like" each dish that is served and begin their meal. If they "dislike" one dish that is served, they just call out "I don't want to eat this dish", then a new one will immediately replace the "disliked" dish. If the displacing dish is still "disliked", the restaurant will continue substituate another dish until the customers "like" it.

It seems out of ordinary at first, but this restaurant is really popular among customers.