If there's one thing Jon Jones knows, it's that Las Vegas LOVES a winner, and he got mad amounts of love inside one nightclub ... hours after he defended his title in UFC 235.
The light heavyweight champ celebrated his victory over Anthony Smith at On The Record -- the speakeasy inside Park MGM -- and was swarmed by fans and friends, raising glass after glass of champagne to him.
Jones was looking pretty pristine after going 5 rounds in the Octagon ... and he probably took more selfies inside the club than he did shots to the face during the bout.