A robot waiter serves customers at a cafe in Budapest, Hungary, January 24, 2019. The robots at the Enjoy Budapest Cafe can do it all - they can serve up food and drink, tell jokes, dance with the kids or just hang out for a chat with customers. REUTERS/Bernadett Szabo

A robot waiter serves customers at a cafe in Budapest, Hungary, January 24, 2019. The cafe, opened by IT company E-Szoftverfejleszt? in the Hungarian capital, is staffed by a whole team of robots that aim to help familiarise the public with the technological revolution in automation and artificial intelligence. REUTERS/Bernadett Szabo

A robot waiter serves customers at a cafe in Budapest, Hungary, January 24, 2019. The robot waiters follow fixed paths to deliver food and drink orders to customers, who are asked to keep out of the robots' way. REUTERS/Bernadett Szabo

A robot waiter serves customers at a cafe in Budapest, Hungary, January 24, 2019. Others serve up entertainment, such as Pepper, a "receptionist" robot that can hold a conversation and also dance with customers. REUTERS/Bernadett Szabo

Children stand next to Pepper the robot at a cafe in Budapest, Hungary, January 24, 2019. "We actually employ twice as many people as before, because to operate 16 to 20 robots from 9 a.m. to 9 p.m. we need to have IT specialists in the background," Csizmadia says. REUTERS/Bernadett Szabo