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Humanoid robot bartender "Carl" pours a spirit into the cocktail shaker of a bartender to prepare a drink for a guest 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-ROBOTS/ )

Mechatronics engineer Ben Schaefer (R) interacts with humanoid robot bartender "Carl" as it prepares a drink for a guest at the Robots Bar and Lounge in the eastern German town of Ilmenau, July 26, 2013. The Humanoid robot bartender "Carl", developed and built by 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/ )

A pedestrian walks past the Robots Bar and Lounge where humanoid robot bartender "Carl" is helping to serve customers, 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-ROBOTS/ )

Mechatronics engineer Ben Schaefer poses with humanoid robot bartender "Carl" at the Robots Bar and Lounge in the eastern German town of Ilmenau, July 26, 2013. "Carl", developed and built by 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-ROBOTS/ )

Humanoid robot bartender "Carl" fills a cocktail glass with spirits to prepare a drink for a guest 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-ROBOTS/ )

Humanoid robot bartender "Carl" fills a cocktail glass with spirits to prepare a drink for a guest 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-ROBOTS/ )

Humanoid robot bartender "Carl" fills a cocktail glass with spirits to prepare a drink for a guest 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-ROBOTS/ )

Humanoid robot bartender "Carl" pours a spirit into the cocktail shaker of a bartender to prepare a drink for a guest 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-ROBOTS/ )

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-ROBOTS/ )

Humanoid robot bartender "Carl" pours a spirit into the cocktail shaker of a bartender to prepare a drink for a guest 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-ROBOTS/ )

Humanoid robot bartender "Carl" is on standby to prepare a drink for 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-ROBOTS/ )