Re the club card - when I was in grad school I joined up w/a friend on the card. She was a single and it was me and my grown son. It was certainly worth the membership for 3 people. Our apartment had a storage room on the patio, so it was easy to stack cases of stuff. Even though I always ended up spending more than I planned, I think in the end we saved money because the prices were cheaper than the local store and we bought non-perishables, so I didn’t have to worry about using things before they spoil, which can be a problem with a small family.
You might want to do one shopping trip as a guest and see if it works for you.
Thank you very much for the useful information./Just Asking - seoul62......