Chris Brown partied without Rihanna after the Met Ball. In a red jacket, Brown was seen weaving through the crowd at the Top of the Standard and dancing by a corner booth. But before calling it a night, the singer made a stop at Meatpacking District club Griffin just before 3:30 a.m. Spies said Brown bought multiple $15,000 bottles of Ace of Spades champagne for himself and 20 pals. He then “jumped on a table and started dancing shirtless” till the club closed just 40 minutes later, a witness said. RiRi has also been partying in town: She was spotted over the weekend at Pink Elephant arriving at 2:15 a.m. with her own entourage of 20. Inside, she hung with pro athletes including Joe Johnson and Adrien Robinson.