I wasn’t sure what to expect when I arrived at the orthopedic wing of a New York City hospital. I volunteered, with an organization called Sing for Hope , to spend about 2 hours going from hospital room to hospital room, serenading patients. Two other girls volunteered as well, and we took turns choosing a song to sing to an audience of one. We were told that the average age for the orthopedic wing was about 65 or older…my specialty as it happens, from years of playing for retirement communities and nursing homes. I brought my guitar so I wouldn’t have to drag a keyboard around and found that most patients were extremely pleased with the impromptu concert. Some clapped along, some dozed off, but most simply smiled with sincere appreciation and delight. I prepared titles such as “Pennies from Heaven,” “Tennessee Waltz,” and “Walkin After Midnight.” But I saved the best song until I found that one person who would appreciate and love it the most. And soon I found her. She was an older...