My daughter is a cashier at the Whole Foods here in Deerfield Twp. Whenever they have the ATP here in Mason, all the players stay at the Marriott just down the road. A lot of them come into Whole Foods to get water, drinks, food, etc etc etc.
Jen has seen a lot of the ATP tennis pros (stars and some not-so stars), pro golfers, and various pro athletes (Bengals, Reds) come through her line. So she's not bedazzled by stars in any way. Serena Williams (and handler) came through her line a couple weeks ago. Jen said she was the rudest person she'd ever encountered, bar none.
Just a data point of one. But it was my daughter so my papa bear instincts arise with a great roar.