Delta is currently selling holiday booklets in their Delta Sky Clubs, which include 4 single visit passes to any of their clubs. They are being sold for $159, or you can use 15,000 SkyMiles to purchase this.
I was told that each club received a limited quantity, so be sure to check with the front desk when you check-in, if you’re interested in purchasing one of these. You can then give the entire booklet to someone, or you have the option of removing each of the passes and giving them to up to 4 different people.
I took a look at the booklet on my recent visit to the SkyClub, and the passes have an expiration date of January 31, 2019.
How To Get Sky Club Access:
In addition to purchasing a holiday booklet, there are many credit cards which provide access to the Delta Sky Clubs. As reminder both the American Express Platinum Card as well as the Business Platinum Card from American Express provide complimentary Sky Club access.