According to several sources, Kevin caught Justin's concert on Friday. He may have been there to see his dancer best friend Eddie Morales and Pink, a friend of his who is Kori's godmother.
On Saturday, (according to nationalledger.com) he went to see the World Extreme Cagefighting matches at the Hard Rock, played the slot machines at the Venetian with friends before hitting the Tao nightclub, where go-go dancers entertained the crowd beneath sprinkles of artificial snow. "He wasn't drinking much and really only talked to a couple of his friends," said one clubgoer. "It seems like he's trying to move on from past Vegas visits where it was all about the bling bling."
While at Tao (according to TMZ.com), he ordered Kobe beef and lobster. TMZ.com also reports that Kevin was paid 1/2 million to appear in the Nationwide commercial.
Here's a short clip of him at Tao (from X17online.com):