Short answer, you don't make weekly trips because the grocery store is down the street. I walked by two good grocery stores on my way home from the subway when

Short answer, you don't make weekly trips because the grocery store is down the street. I walked by two good grocery stores on my way home from the subway when I lived in NYC, I'd just buy what I needed for that night. Or you buy your own cart, you see them all over in NYC, for groceries and laundry.