En español | Most definitely, according to this empty nester. Though our three children are now adults on their own, my wife and I still shop at two warehouse clubs. True, we no longer buy those mega-size containers of food. But we continue to pay less for everyday purchases like meat and milk, as well as big items like tires and TVs. Sometimes the savings are very big — I've seen warehouse price tags of half of other stores'. So do the math — if you'll spend at least $300 a year at a club, it's probably worth the membership cost. And if you're having guests this holiday, you may need mega-size food again.

Sid Kirchheimer writes about consumer and health issues.