Cocktail robots mix mojitos

VIENNA - Staring with glowing red eyes at a young woman strolling by, bartender Chapok slowly extends his arm to offer her a gin and orange.
She takes the glass, murmurs a flustered "thank you" and walks away while the cocktail-mixing robot turns his attention back to a row of bottles.
"People are interacting, they are actually talking to my robot," smiles David Calkins, who teaches robotics at San Francisco State University.
"This is fantastic, exactly what I was hoping for."
Chapok is one of around 30 robots at Vienna's annual Roboexotica, which showcases how home-built machines deal with the modern pastime of hanging out in bars.