Humanoid robot bartender "Carl" gestures to guests at the Robots Bar and Lounge in the eastern German town of Ilmenau, July 26, 2013. "Carl", developed and built by mechatronics engineer Ben Schaefer who runs a company for humanoid robots, prepares spirits for the mixing of cocktails and is able to interact with customers in small conversations. Picture taken July 26, 2013. REUTERS/Fabrizio Bensch (GERMANY - Tags: SOCIETY SCIENCE TECHNOLOGY BUSINESS)