Yes you can
Costco does not offer 1 day or any period as a guest pass. Full membership required. If you forgot your card, after showing ID, and verifying an active membership they will give you something for the day. Unless, you want a new card issued. BJ's offer guest passes for 1 day, 3 day and 30 days.
I'm not sure is there such a thing, of a one day pass
Yes, or you can use Costco gift card without membership
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