For a limited time (until 12/31/2019) Amex and WeWork are offering this benefit for one-year
Registration is now open for folks who would like to take part in this benefit for American Express Business Platinum card holders. Note that Platinum Corporate card holders are not eligible. You can sign up for this benefit until 12/31/2019 here at WeWorks website: https://www.wework.com/businessplatinum
This is a great benefit for existing cardholders. Note that there is no indication of being available as an ongoing benefit. They may be testing out this benefit to see how it works out first. Retail value of this benefit is a whopping $2700. You get access to the WeWork common area and not the personal rooms in their 300+ locations.