Definitely. We’re a household of 2 now, but my generic Claritin alone pays for my annual membership. They have the best prices by far on OTC drugs and supplements, yogurt, toilet paper, cleaning supplies, basic nonperishable foods like canned tomatoes, beans, canned tuna, walnuts and other nuts and dried fruits, olive oil, cage-free/organic eggs, milk, butter (which is easily frozen)…all of these things were worthwhile even when I was single.
If you eat meat in any quantity, and have a freezer, the quality can’t be beat for the price.
The Kirkland brand merino wool socks are also awesome and cheap as dirt.
I buy some basic clothing items there now and again (pajamas, the occasional sweatshirt, socks, etc.)
Until I recently got good employer-based vision coverage, I got my eye exams there.
The aforementioned gas - we drive around 3,000 miles a year, so it would be even more worthwhile for people who drive more.
If you want to buy a new or certified used vehicle, and have no patience or talent for price haggling, they have a vehicle buying program.
We buy the occasional small household appliance there (blender, toaster oven, etc.), either for ourselves or as a gift for someone else.
They have discounted movie tickets for the major chains.