Originally posted by Heat
Pay with cash, assuming you are the same gender.
Incidentally, you don't need a Costco membership to buy alcohol there (or at Sam's, or any other membership club). Try it, take some alcohol to the cashier and tell them that you aren't a member (and if they balk, ask to talk to a manager, clerks are usually clueless). There is a federal law which prohibits stores from requiring a membership to buy alcohol. I buy alcohol at Sam's (without a membership) once a month or so.
Of course your local Costco, BJ's or Warehouse club has to carry alcohol which not all of them do. (The ones near me do not carry alcohol at all.)
Also if you wanted to be picky a clerk certainly would have to allow the purchase of the alcohol, but could refuse to sell you any other merchandise that you may be trying to purchase at the time.
WiccanPagan, I just remembered that when I was at Costco I was reading the back of their "Costco Cash Cards" (giftcards) and remember reading that members can give these to non-members and the non-members will be allowed to shop at Costco in order to use their cards. They just need to stop at the membership desk for a "one-day shopping pass." It's a hassle but if your friend wanted to give you some money to put on a card and then when he went to the Costco he could get a shopping pass and if he bought more than he put on the card he could just pay for the rest with another method of payment.
If you decide to do that, just check to make sure that the GiftCards aren't different in your area and they do indeed mention the same thing.
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