August may be a sleepy month for fashion, but that didn’t stop Jason Wu, Simon Doonan, and Jill Kargman from celebrating Architectural Digest’s September style issue on Tuesday. The next day, the Central Park Zoo hosted Rachel Zoe, Diane Kruger, and dozens of well-dressed toddlers for the Polo Ralph Lauren children’s show. Later that night, Alexander Skarsgard and Prabal Gurung attended the New York screening of The Diary of a Teenage Girl, and Nick Jonas smoked a cigar with Rita Ora at a record-label party in L.A. Click through the slideshow for all that and more from this week’s parties, including an appearance from Dina and Ali Lohan.