Manuel "Manny" Aguirre, 80, has been mixing cocktails at Musso and Frank Grill in Los Angeles for more than two decades. He works part time and could retire — but he doesn't want to. Courtesy of Musso and Frank Grill hide caption

itoggle caption Courtesy of Musso and Frank Grill

Man signing a contract in his attorney's office. Lisa F. Young/iStockPhoto hide caption

itoggle caption Lisa F. Young/iStockPhoto

Failures in ordinary care are causing widespread harm that's sometimes serious, inspectors say. iStockphoto hide caption

itoggle caption iStockphoto

The fastest-growing part of the online dating market is people over 50, according the CEO of the Match Group. Carmen Winant/Getty Images hide caption

itoggle caption Carmen Winant/Getty Images

The divorce rate for Americans over 50 doubled between 1990 and 2010. Alexander Abramov/iStockphoto hide caption

itoggle caption Alexander Abramov/iStockphoto

Pansy Greene, 73, is in the early stages of Alzheimer's. She and her husband, Winston, have been married for 57 years. She says her secret to maintaining a normal life is to stay active and positive. David P. Gilkey/NPR hide caption

itoggle caption David P. Gilkey/NPR

Gilroy Hain's only source of income is the $1,500 a month he receives from Social Security. Ina Jaffe/NPR hide caption

itoggle caption Ina Jaffe/NPR