Jay-Z , a k a Shawn Carter, brought his sister, Melanie Carter, to see Samantha Ronson spin Wednesday night at the Gansevoort Park Hotel rooftop bar, Red Room. The Carters hung out with Sean Combs at the party, which took on an old-school hip-hop vibe when a girl started breakdancing in the middle of the floor. Jay and Combs cheered her on before leaving around 2 a.m. Earlier that evening, Jay was spotted having dinner with branding honcho Steve Stoute at sushi restaurant 15 East.