PARTIESPhotos: Cool Katzby Emilia Petrarca05.14.151Alex and Ada Katz. Photo by BFA.com.2Photo by BFA.com.3Casey Fremont, Doreen Remen, and Yvonne Force Villareal. Photo by BFA.com.4Photo by BFA.com.5Katie Ermilio, Eva Zuckerman, and Dimitri Scheblanov. Photo by BFA.com.6Laura de Gunzburg. Photo by BFA.com.7Mark Lee and Lisa Perry. Photo by BFA.com.8May Kwok. Photo by BFA.com.