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Adam Levine, Barry S. Dakake

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Adam Levine's dated his fair share of supermodels through the years, but his bachelor days will soon be coming to an end. (Don't feel too bad for the guy—he's engaged to Behati Prinsloo, a supermodel herself.)

So it was only fitting that the Maroon 5 rocker said goodbye to singleness in style, which is exactly what he did Wednesday night with his Las Vegas bachelor party!

"Adam and his group of 55 (all gentlemen) dined in the private dining room of N9NE Steakhouse," a source tells E! News. "The entire restaurant recognized Adam right away, and he stopped to chat with several guests."

The 35-year-old Voice coach didn't seem to mind all the attention. In fact, he "was all smiles and appeared to be in great spirits," says an onlooker.
 
Levine and his pals "dined family style, sampling practically everything on the menu including the Shellfish Platter, filets and salads," says a source. "Several toasts were given throughout the meal while the group took shots of 1942 [Tequila]."

The restaurant's executive chef Barry S. Dakake Instagrammed a picture with the bachelor himself, and from the grin on Levine's face, it looks like he was a fan of the food!

At the end of their meal, the future groom and his pals "all took espresso shots." Why no over-the-top chocolate dessert? The "Sexiest Man Alive" can't keep those abs tight if he's carbing it up late night!

The wedding day is all about the bride, but you know Levine wants to (and will) look good, too.

—Reporting by Sara Kitnick

PHOTOS: Adam Levine and more of People's "Sexiest Man Alive" hunks through the years