Joan Agajanian Quinn, who just celebrated her 88th birthday, is still a ubiquitous presence in Los Angeles’s art scene, though she has retired her pumps in favor of velvet Mary Janes from Paris’s Rue du Bac. Quinn is best known for the art collection she began building in the 1960s with her late husband, John J. “Jack” Quinn, a prominent Los Angeles attorney. Many in the art world credit them with helping to establish Los Angeles as a vital center of postwar art. “On the Edge,” a new exhibition at the Laguna Art Museum, offers a rare glimpse into Quinn’s highly personal collection, much of it acquired through her friendships with artists such as Ed Ruscha, Lynda Benglis, Ed Moses, and Robert Graham, to name a few. The show also includes some of the nearly 300 portraits of Quinn made in the past 50 years by artists such as David Hockney, Jean-Michel Basquiat, and George Hurrell, as well as contemporary Los Angeles artists Joey Terrill and Yolanda González. —Stacie Stukin