Chris Brown and Rihanna watched the Floyd Mayweather fight in Las Vegas on separate coasts this weekend after splitting up — again. Rihanna spent the weekend in New York as she prepped for her concerts at Barclays Center. Rihanna watched Mayweather batter Robert Guerrero at the 40/40 Club in Manhattan. A source says, “She arrived minutes before the fight started with an entourage and headed to the Players Lounge, her usual room of choice.” Rapper Wale also joined her in the private room. Later Rihanna exited hand-in-hand with friend Melissa Forde and headed to SL. Brown, who declared he’s no longer dating Rihanna because, “I can’t really be focused on wife-ing [her],” cozied up with a blonde. He went to the boxing match at the MGM Grand in Vegas, then headed to 1Oak at the Mirage with the unidentified tattooed lady. He partied with 45 pals while enjoying 10 bottles of Ace of Spades, five bottles of Patrón Platinum and about a dozen of vodka. Chris’ new girl was by his side all night. “She was dancing and engaging in PDA throughout the night,” said one onlooker. At 3:30 a.m., Brown and his date were seen leaving the club together holding hands.