The dude with the hat is one lucky guy ... hangin' with Winnie Harlow and her fellow models on a yacht in Miami.
Winnie, her best friend Cindy Bruna and 4 of their comrades in arms hopped aboard the yacht of Dave Grutman -- the King of Miami.
Grutman -- who owns some of the most popular clubs and restaurants in the Miami area -- is also known for his boats, and the one there's own is new ... in fact Saturday's ride was the inaugural run.
It's good to be king.