The always charming Donald Sterling ran a clinic on "How to Win Friends and Influence People" yesterday ... when a photog asked the disgraced Clippers owner how he was doing.
Sterling's response -- well, he basically told our guy to go F himself.
It's not like Donald's got a lot to be happy about these days -- his estranged wife sold his team, he's been banned for life from the NBA and he's being sued by an alleged former employee who claims D.S. subjected her to a bunch of offensive comments.
Hard to believe, right?!