On the East Coast, temperatures dropped to unwelcome winter lows this week, but that certainly didn’t seem to keep anyone at home. Last night in New York, Jenna Lyons and company joined Casey Neistat to celebrate the release of his new short video, Travel With Style — a tribute to the new Ludlow Traveler suit and manifesto against traveling in PJs. Lyons wore red heels and a biker jacket for the occasion, and posed for an uncharacteristically frisky photo with Derek Blasberg. Across town, Maggie Gyllenhaal, Lynn Yaeger, and Hamish Bowles donned colorful prints to attend Barneys’ dinner in honor of Dries Van Noten, while Leandra Medine and Inès de la Fressange wore bright whites to celebrate the launch of Roger Vivier’s spring collection. Click through our slideshow to see Lyons and Cynthia Rowley in matching glasses, Casey Neistat dancing on his own, and more highlights from this week’s party circuit.