Demi-free party.

On the night before his six-year wedding anniversary with Demi Moore, Ashton Kutcher flew solo at Fluxx club in San Diego.

As Moore, 48, promoted her directorial work in Lifetime's Five anthology, Kutcher let loose bonded with former That 70s Show costar Danny Masterson in Fluxx's VIP area.

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With other pals, the twosome ordered bottle service as they chatted with other revelers at the packed club.

"Ashton was in a party mood," a witness tells Us, adding that the 33-year-old stood up on the red banquette as the music amped up. with his pals and stood on the seating with Danny and the others when the music picked-up.

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As word got out that the Two and a Half Men was at Fluxx, clubgoers flocked to the VIP area to chat with the star.

After leaving Fluxx past midnight, the crew hit the Hard Rock Cafe about three blocks away.

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And a week later, despite rumors of an impending split and Kutcher's alleged affair, he was snapped on Thursday with his wedding ring.

"When you ASSUME to know that which you know nothing of, you make an ASS out of U and ME," Kutcher retorted on Twitter.

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