Tony Romo last night continued celebrating his breakup with Jessica Simpson by rocking out to the sounds of glam metal cover band Steel Panther. Tony and some pals, including rocker Ryan Cabrera and Dennis Haskins of Saved By the Bell, checked out the band at LA's Key Club.

"He looked like he hadn't a care in the world," an eyewitness tells Life & Style, adding that Tony and his pals partied the night away in a VIP booth.

In better days, Jessica and Tony used to show up together at the regular Monday-night gig by the band -- formerly known as Metal Skool.

"Tony was having a blast," says the eyewitness. "He was laughing and high-five-ing his friends all night. He and Ryan were inseparable. They were hugging each other and giggling while they checked out all the hot chicks dancing onstage.

"One girl in a little black dress was getting really crazy. She was treating her time onstage like an audition at a strip club. It totally caught the boys' eyes and they started throwing ice at her and motioning for the bouncer to call her over. The pretty girl found her way over and started talking to Tony. He invited her up to the booth but refused to pose for a photo with her. She got a little discouraged and started to walk away. But moments later Tony whispered in his friend's ear and sure enough the friend followed the pouting beauty. Soon enough she was smiling again and back at the VIP table."

At one point during the party, Ryan, who was drinking Grey Goose straight from the bottle, and Dennis jumped onstage with the band and tried to bring Tony with them. But Tony hid at first, causing his pals and the band to taunt him from the stage until he relented.

"As soon as Tony stood up and showed his face they tossed him the mic. He got into it and sang a few bars of a Guns 'N Roses song. It was awesome!"

For more on Tony and Jessica's breakup, check out the new issue of Life & Style, on newsstands tomorrow!

Photo Credit: INF