Guy Who Used to Tend Bar, Tends Bar
Semi-recent film, likely made after 2000, definitely after 1990. Some people are at a bar, but there's no bartender. One of the group hops over the bar, rolls up his sleeves, puts on an apron and starts making drinks. His friends are all amazed. How does he know how to do this? He's a young professional of some sort-- lawyer, broker, whatever-- and should not know how to make a gin & tonic. He tells them he used to tend bar when he was younger.
What movie is this?