If you haven't already paid for a $60 membership, this Costco benefit just might persuade you to sign up now.

A Costco membership comes with so many perks: You can grab a quick lunch for less than $5 at the food court; shop items that you wouldn't find anywhere else, like long-lasting avocados and cotton candy grapes; save on weeknight dinners with Costco's signature $5 rotisserie chicken; and, of course, shop Costco's private-label products at prices that are much cheaper than other retailers. But the benefits associated with a Costco membership go way beyond cheap, healthy groceries—Costco can also help you save money while improving your health.

Costco's best selling point for their memberships may actually be the partnership they have with 24 Hour Fitness, a gym chain with 400 locations across the United States that offers yoga, cycling, and high-intensity interval training classes to all members. And instead of shelling out hundreds of dollars each month for a membership, your Costco membership allows you to purchase a two-year membership to the gym for just $400, which works out to be just over $16 per month.

The same membership would cost non-Costco members around $800, which means in addition to all the savings on groceries, alcohol, furniture, appliances, medication, and even jewelry, you'll save 50 percent on a gym membership, too. The membership to 24 Hour Fitness also includes free access to group fitness classes, plus other services like daycare that’ll watch your kids while you get your sweat on.

Want to see what Costco's all about before buying a membership? Read on:

The Costco gym membership also lets you visit any 24 Hour Fitness location, making it that much easier to stay fit when you’re on the road. You'll have to fork over a big chunk of cash at first, which can feel scary—but just like Costco's $60 membership fees, you'll soon realize how much you're saving when you're able to hit the gym anytime you want and enjoy fitness classes that you may not have ever considered before.