Steve Norris of Norris Labs has developed a friendly beer serving robot.
In fact, there are two separate robots.
The first one, Baxter or ButlerBot goes to pick up the beer and brings it to the one who drinks it.
When it arrives near the robotic refrigerator, Robofridge opens all by itself and finds a real cold can to give it to Butlerbot.
In the video below, Baxter rover robot uses navigational lines on the ground for more accuracy as to where it needs to stop.