> Costco requires a mask to shop in their stores (at least where I am.)

We went to a Costco in Toronto, Canada a couple of days ago. If you didn't have a mask on, they pointed you at a table off to the side where they had free masks, hand sanitizer, etc. Some people would accept the free mask, but others went in maskless. A staffer at the front door appeared to be keeping tally of people without masks using a sheet of paper (as opposed to the standard front door person who counts everyone going in with a little clicker thing).

I'd say about 15-20% of people in the store weren't wearing masks.