Kevin Federline who has kept a low profile as his child custody battle with ex Britney Spears looms, hit the Venetian's Tao Nightclub in Las Vegas Friday night with a party of 25 reports PEOPLE.

Kevin Federline drinking straight from the vodka and Jagermeister bottles

"He was drinking straight from the vodka and Jagermeister bottles," an onlooker said. "I didn't see him with a drink in his hand that much, but he drank out of the bottles a few times."

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Federline and his group arrived at the club around 11:30 p.m. and had dinner at Tao's Loft before retreating to the club at 1 a.m., says a source. There, Federline started the party with bottles of Jack Daniels, Grey Goose and Jagermeister.

"He was grinding up on a few of the girls."

"He had a flashlight and was shining it on some of the girls around him."