3. Waiters/waitresses

Intelligent service robot serves clients in snacks bar in Chengdu city, capital of Southwest China's Sichuan province, Dec 14, 2014. [Photo /Chinanews.com]

Restaurant owners all share the same headaches－customers complaining about errors made by waiters in taking their orders, slow service because the waiters are too busy, and the high cost of hiring staff.

These problems simply will not happen with robots. They are designed to provide services strictly according to the orders they have received and will never complain about being exhausted.

In a robot restaurant in Harbin, 20 robots are in charge of all the restaurant's various services. There are delivery robots, noodle-making robots and even entertaining robots.

When a customer enters the restaurant, the usher robot will stretch out its machine arms and say welcome.

In the United States, a bar-tending robot is designed to make cocktails according to their customers' mood.

Of course, before the intelligence of robots is developed so they can communicate, customer experience of robot-waiting might not be as good as human waiters/waitresses.