Can you get a guest pass just to see if you want to join?

Yes you can get a guest pass at the service desk

You can get in to the store without showing a card

No card is needed to get in, just to check out! Pretty good deals if you need to buy in bulk and don't have access to a Costco IMO.

You don't need a card to enter. So you can walk around and compare prices for free. You do need a card to purchase items though. I do believe they have guest events annually but you would need to check their calendar of events.