Robotic Bar – Feasible?

Is anyone aware of a fully robotic bar? It seems to me that in the age of automation - why are we still relying on Bartenders to pour drinks? This produces variable drinks, longer wait times, overcrowding at the bar, and additional cost (tip) to the consumer. A bot could mix consistent drinks, at a high rate. Human labor would be used to monitor guests for overconsumption etc. Has anyone ever given though to this? I'm considering prototyping this out.