After wrapping up a six-date run at London's O2 Arena, Beyoncé and her husband, Jay Z, hung out at The Arts Club in Mayfair on Thursday night. The couple, joined by Swizz Beatz and Will.I.Am, reportedly partied it up until 5 a.m. after hitting the stage together. Jay and Beyoncé were also seen leaving The Arts Club together earlier this week, so it seems as if they've found a new favorite overseas spot. Jay has been popping up on stage with his wife during the second leg of her Mrs. Carter Show World Tour, which kicked off last month in Glasgow. They've been performing the single "Drunk in Love" together (here's your excuse to watch their steamy Grammys gig again), and beginning this weekend, Beyoncé's shows will bring her to Dublin, Amsterdam, and Barcelona.