Every Tuesday morning at 11 a.m. during the pandemic, Shirley walked a mile-and-a-half in Central Park. A concert pianist in her early 90s, she faithfully participated in a weekly walking group called “One + One Walk,” which began and ended at the north side of Engineer’s Gate. The walk was organized by Carnegie Hill Village, a nonprofit grassroots organization. According to its website, the organization assists “older residents of Manhattan’s Carnegie Hill neighborhood with social connections, information and personal resources that can enable them to continue living at home, in their neighborhood, as they age.”