When it comes to the Met Gala, the party doesn’t stop after the museum doors close. In fact, depending on who you ask, that’s just when the night begins. After a performance by Katy Perry, the red carpet debut of two hot new couples, and countless bathroom selfies, celebrities once again descended upon the famous Metropolitan Museum of Art stairs, making a mad dash for the cars and a quick change into something more party-friendly, and maybe a quick power nap—or Red Bull. It was a long night, after all. For most, the first stop was The Standard, where Katy Perry co-hosted the hotel’s eighth annual party, which brought out Dakota Johnson, Jennifer Lopez and Alex Rodriguez, Kate Hudson, and Elle Fanning, among others. There was also a smaller, more refined affair at the National Academy Museum, in honor of the night’s honoree, Rei Kawakubo. But it wasn’t until 2 a.m. that the real party started, with Rihanna throwing her own bash at 1 Oak with Perrier-Jouët, Absolut Elyx, and Avion Tequila. For the best images straight from inside, click through.