This past Sunday's terrific episode of "Girls" found Marnie (Allison Williams) inviting Hannah (Lena Dunham), Jessa (Jemima Kirke) and Shoshanna (Zosia Mamet) out to a family friend's house in North Fork for a "healing" weekend. Then Hannah asked over her ex Elijah (Andrew Rannells), his new boyfriend (Danny Strong) and their two friends, and the ladies' weekend became a more tense, funny day and night of skinny dipping, drinking and passive and open aggression. And dancing! One of Elijah's friends was played by Broadway star T Oliver Reid, who taught and then led the four young women through a dance number. Now HBO's released a video featuring Celia Rowlson-Hall, the choreographer for the episode, so that you can learn the dance at home, hopefully not preceding a giant blowup between you and your friends. Check it out below: