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Rihanna, J. Cole, ?uestlove, Lyor Cohen and more joined Jay-Z last night (September 27) for the grand opening of the 40/40 Club inside the Barclays Center in Brooklyn. The star-studded affair found the Roc Nation boss, cladded in a suit, welcoming close friends and family to the first party at the new nightclub on the night before the arena opens to the public. <br /><br />"I walked around here earlier and I just seen everybody busy and at work trying to finish up and it was a great feeling," Jay-Z mentioned to MTV News, while entering the 40/40 for its grand opening. "A guy stopped me in the hallway and said, 'Man this is a great thing for New York City.' And that's what the whole thing was about." Check out some of the flicks from the celebration here.—<em>XXL</em> (@XXL)

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Jay-Z on the red carpet

rihanna

Rihanna

Jay-Z

Mr. Carter

Adrianne

Adrienne Bailon

ColeandRiRi

The Roc's all here. RiRi alongside J. Cole

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Jigga

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Brooklyn Nets Head Coach Avery Johnson

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Brooklyn Nets’ Joe Johnson

Anthony-Mandler

Director Anthony Mandler

Deron-Williams

Brooklyn Nets’ Deron Williams

Angie-Martinez

Hot 97’s Angie Martinez