It depends. If we're post-scarcity then my customers would be like the Ten Forward customers on the Enterprise and I'd get to wear a sweet hat like Whoopi.
If not, then I assume they'd be like I am now: someone lucky enough to be able to take advantage of the current status of the labor marketplace.
As for the robot bartender, I'd imagine myself working in a hipster bar that still uses human bartenders because it's simple, authentic, and people like that it's old-fashioned. We'll even have Edison bulbs.
What I WOULD do is move to a place with the lowest possible cost of living and become a bartender or something equally undemanding.