A very modern and seemingly complicated version of what I would like to do.
The Inebriator. This is more along the lines of what I would like to do. In fact these guys from the UK inspired me to start this project. Www.theinebriator.com
This uses an interesting device for measuring out the liquids. However it isnt very easy on the eyes. http://www.wired.com/design/2013/03/bartendro-robot-bartender/