During his self-imposed moratorium from rapping, Jay-Z turned his attention to the business side of music, becoming president of Def Jam Recordings. As president of Def Jam, Jay-Z signed such popular acts as Rihanna, Ne-Yo and Young Jeezy and helped effect Kanye West’s transition from producer to best-selling recording artist. But his reign at the venerable hip-hop label wasn’t all smooth sailing; Jay-Z resigned as Def Jam’s president in 2007, complaining about the company’s resistance to change from ineffectual business models. “You have record executives who’ve been sitting in their office for 20 years because of one act,” he lamented. Jay-Z’s other, ongoing business ventures include the popular urban clothing line Rocawear and Roc-A-Fella films. He also owns the 40/40 Club, an upscale sports bar with locations in New York and Atlantic City, and is a part owner of the New Jersey Nets basketball franchise. As Jay-Z once rapped about his business empire, “I’m not a businessman/ I’m a business, man.”