Adam Levine and Jonah Hill were playing at the high-rollers’ tables at the Hard Rock Hotel and Casino in Las Vegas on Friday, but they needed some sexy good-luck charms to try and stop a losing streak. The Maroon 5 rocker and his “21 Jump Street” star sidekick were seen gambling at the Hard Rock when Levine’s Sports Illustrated Swimsuit-model gal pal, Nina Agdal, sidled up to him, fresh from the magazine’s Summer of Swim Bash at the Wynn Las Vegas. When she was followed by fellow models Julie Henderson, Genevieve Morton, Kate Bock and Alyssa Miller, Hill was overheard saying he and Levine were “both down $15,000,” and he hoped the beauties would “work as good-luck charms.” It’s unclear if the duo made back their dough, but spies said they seemed “unfazed by the losses.” Meanwhile, over at Andrea’s restaurant at Wynn’s Encore resort, John Legend was spotted away from the tables keeping his own model fiancée, Chrissy Teigen, company in a private booth. Teigen also had partied at the Summer of Swim event.