Last night’s Girls took Hannah, Marnie, Jessa and Shoshanna to a beach town on the North Fork of Long Island where they got drunk, fought and — most memorably — learned and performed a delightfully ridiculous dance routine. If you’re a fan of what you saw and want to replicate it on your own nightmarish weekend away, good news! Celia Rowlson-Hall, the choreographer behind the piece, has released a how-to video just for you.