NEW YORK -- If joining a book club and playing pinochle are hardly your visions of the perfect retirement, you’re not alone. Consider these individuals--a mystery shopper, a mobile dog groomer and a movie extra--who are using their second winds to do the unconventional.

Mystery Shopper

Walter Babcock said he’s always paid special attention to customer service, even before his days as a professional mystery shopper. The 63-year-old from Indianapolis, Ind., who retired in January ‘07 after 26 years as a marketing executive with photography
……