What is summer without the Grateful Dead on the soundtrack? While “Sugar Magnolia” plays in your headphones, visit the David Kordansky Gallery in Chelsea to check out its newly opened Grateful Dead show. Curated by Ricki and Jay Blakesberg, the exhibition features 21 large-scale photographic prints and more than two dozen smaller ones that document all eras of the iconic band—including several images shown for the first time. Moving between intimate moments and big performances, the exhibition centers on the rare access and trust of Grateful Dead photographers Jay Blakesberg, Adrian Boot, Suki Coughlin, Greg Gaar, Andy Leonard, Rosie McGee, Bob Minkin, Ron Rakow, Jon Sievert, Elizabeth Sunflower, and Kirk West. With the recent losses of Bob Weir and Phil Lesh, “An American Beauty” feels more poignant than ever and is not to be missed. —Gracie Wiener