Back On? Nick and Vanessa

At first it seemed like just another guy's night out. But Nick Lachey's hosting duties at the Borgata's Mixx nightclub (after the Tarver vs. Hopkins fight Saturday night) ended with a surprise female addition: Vanessa Minnillo. Lachey was spotted leaving the Atlantic City hot spot with the MTV veejay – whom he linked up with back in March – at about 4 a.m. Sunday.

Still, most of the night was for the boys. Lachey, who has been romancing stylist Kim Kardashian, walked into Mixx just past 1 a.m. to the Rocky theme song with eight male pals, then kicked back with bottles of beer and a toast. But once Minnillo arrived in the VIP section wearing short shorts and a black tank top about an hour later, they locked eyes and were "Livin' on a Prayer," pumping their fists together to the Bon Jovi anthem.

A few songs later, the two clasped hands, danced briefly to Madonna's "Like a Prayer" and chatted into each other's ears. Finally, Lachey and Minnillo made their exit – he grinning, and she leading the way to the elevator. No word on what happened once the doors closed.

Source: People.com