This week marked the annual Coach Summer High Line Party, when partygoers put on their best hot-weather-wear and posed next to some sea grass. This year’s gathering drew Kate Mara, Keri Russell, both Chloes (Mortez and Sevigny), as well as Giovanna Battaglia and Eva Chen, who coincidentally showed up wearing wide-legged, floral pants. Meanwhile, J.Lo was busy celebrating the launch of her new album, A.K.A., at Up&Down, while across town, Bette Midler wore an enviable emerald green caftan while chatting up Liz Smith at the 30th Annual Literacy Partners Gala. In L.A., Vera Wang celebrated the opening of her new Rodeo Drive store with Rachel Roy, Rosamond Pike, and Kat Graham, while Waris Ahluwalia and Stefano Tonchi convened in Istanbul for this year’s IST. Festival. Click through the slideshow for these and more highlights from this week’s party circuit.