Can you eat in the food court without a membership? I read an article online that said you could, I don’t know if that applies to all Costco’s or just certain ones.

Good question, you Must have a Membership card to purchase anything from Costco and most Costco's require card visual verification before you even enter the store, so let's talk about the eating and the food courts I would think you could nibble on something, but in some Costco's you can't even get into the store two sample anyting if you don't have a membership card so it all depends on the store hopefully my Insite had some information useful to you

Yes you can go in and eat go thru exit way.

I have been told you do NOT need a membership to go in the exit and get food/go to the restroom. I myself have gone in the exit side without my membership card many times... and gotten food to eat.