I have to agree with this. I'm single in my mid 20s, no kids, but I've had my Costco membership since early college when I moved out of my parents' house. My mom said that I didn't really need one (I could just go shopping with her), but I decided to get one anyway. The annual membership fee is pretty reasonable.

I was quite popular with my chapter sisters as well. On the weekends we used to make group trips to Costco!

Most of the stuff I buy at Costco are non-perishables. I really don't need milk and cheese that's big enough to feed a 3rd world country. For those things I still go to the grocery store.

And the gas is always the least expensive in town. Usually when prices drop, there's a line of cars wrapping around the block. But hey...it's worth it.