Bartenders provide a level of personal service that robots cannot provide. They talk to their customers that at the end of the day will drive repeat business. Most state laws also mandate that a bar not serve an intoxicated person an additional drink and I don’t think a robot can effectively make this judgment.
A robot can come with motion and face detector sensors as well as a breathanalyzer. I think it's possible that a robot would be better at detecting intoxication and checking the actual level. There's also no arguing with a robot, you can't guilt, shame or threaten it into giving you another shot.
That said, some people do go out for a drink looking for companionship and the impersonal interaction with the robot might just make them even more depressed.
Bartenders cost next to nothing in terms of payroll ($2.13/hour) and in general the more they sell, the higher their pay will be in terms of tips received. They have incentives to sell as much alcohol as they can without selling to a drunk person. They can take social cues that can help them sell more.
A robot can tell when a person exceeds certain limits but generally cannot use judgment. A robot cannot say ‘this doesn’t feel right’ even if it technically complies with the rules.
Many bars also have policies that require a bartender who cuts a patron off to inform management who will inform other bartenders and if one is caught serving the cutoff person they could be fired, or so I have been told.
Bartenders provide a level of personal service that robots cannot provide. They talk to their customers that at the end of the day will drive repeat business. Most state laws also mandate that a bar not serve an intoxicated person an additional drink and I don’t think a robot can effectively make this judgment.
Tell that to the Soda Jerk
I've already had drinks served by robots, its not really that exciting unless you build a really stupid inefficient robot. Take a soda fountain with coke in it, add rum, and you've got a rum and coke dispenser.
Ive gotten sodas from what amounts to a robot. In general sodas have free refills and cost very little. They don’t really drive profits very much. The need to sell a lot of soda is really not there IMO. There also isn’t any risk of selling a soda to a drunk person.
Or are you talking about being served alcoholic drinks with alcohol already in it?