This is generally permitted, but it comes with significant restrictions. Restricted Categories for Guests While walking the aisles is allowed, there are specific sections of the warehouse that are strictly off-limits to non-members, even if you are with a guest.
Going to Costco as a Guest Without a Membership
Your host must present their physical membership card at the entrance checkpoint for security staff to scan, which activates the guest privilege for that visit. This arrangement works well for someone who wants to see the warehouse or purchase specific items that require a membership.
The member is not just your ticket for entry; they are also your accountability partner. In most states and locations, only members (or individuals over the legal age with valid ID who are not guests) can purchase alcohol directly.
Going to Costco as a Guest Without a Membership
If you are with a member, you generally cannot buy wine or beer at the warehouse, even if you are of legal age. The key here is the requirement of in-person membership verification.
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