Just when you thought Kevin Federline might be an okay guy, he shows off some douchbaggery at a Las Vegas nightclub. He and a few buddies were partying at Wasted Space, a club in the Hard Rock Hotel. Since he is Mr. Ex-Britney Spears, he was given several free bottles of Grey Goose Vodka and K-Fed apparently doesn’t understand that you tip for service, not for cost because he left the waitress a ZERO DOLLAR TIP!

And we all know Mr. Ex-Spears is pulling in the dough from Britney to support their two kids. He is even making a bonus $30,000 just to watch them while she’s on tour!

Classy Kevin, real classy.