Robot are more and more able to emulate humans and animals. The Humanoid Robotics Laboratory in Austria believes they lack a crucial characteristic: robots will be just robots if they are only our intelligent, cheap workers and adjutants. To get less boring robots should get mankind’s most striking feature the pursuit of its own advantage.
So they made the Bar Bot, driven by self interest, its only aim is to drink beer. In order to achieve this goal in bars, it asks people for coins and spends them as soon as there is enough for a beer.
To reach its selfish objectives, it dependends on others: somebody has to give it coins or hand it a beer. This is where it engages in communication, in social interaction with human beings.