On June 29, the upstate sculpture park staged its annual day-long fête, a Summer Night, from its bucolic New Windsor campus. The institution’s supporters began the night with an opening dinner by Leah Guadagnoli’s Fancy Feast Supper Club before the park opened to a wider circle of attendees. After taking in the current exhibitions, including Arlene Shechet’s “Girl Group,” the crowd settled in for musical performances by Julie Byrne and Matty Lattimore. Photo credit: Jess Glass.