Details Magazine’s Most Influential Man took time away from his gig as Daddy Dearest to knock back shots of Tequila and shoot some pool on a boys’ night out in Los Angeles on Sunday night. Kevin Federline partied with pals at low-key sports bar, Busby’s in the Miracle Mile.

We hear paid for his drinks in cash and tipped generously, while the management supplied him with free shots.

“He seemed to be having a great time,” one onlooker says. “The bar was a far cry from his usual nights out in Vegas, but he seemed to be enjoying himself nevertheless.”

He spent around four hours shooting pool, drinking and playing on the Shuffle Board, in between nipping to the patio area for cigarettes.

“Kevin was loving every minute,” the onlooker said. “There were scores of girls trying to talk to him, but he seemed more interested in hanging out with his mates.”

“He would throw his arms in the air every time he took a good shot.”

“He may be in the middle of a complicated legal battle, but he seemed to have forgotten about that tonight.”

“He was drinking Jack Daniels and coke all night,” a source at the bar said.

“He was being given quite a few free drinks, so his tab only came to about $40 or $50 – but he still tipped $30 on top of that.”

“The manager took him a few tequila shots, and egged him on to down them. He duly obliged – he was being a really good sport.”