This is the Droid I'm Looking For: Keg-a-Droid

Keg-a-Droid is made by a veteran robot manufacturer, SuperDroid Workshop. It consists of a wheeled platform with a modified, half barrel keg on top, and a tap tower, complete with CO2. Put a 1/6 bbl keg, or one of your Cornie Kegs, into the modified keg, full with ice and attach to the tap. A remote control system will bring your beer to you, not the other way around!

Finally!

It is a tad pricey, though. You need to pony up $2100 on their Kickstarter page to get your own Keg-a-Droid complete with a charging station (which I imagine to look like something Seven of Nine used on Star Trek: Voyager).