I asked the Mariner society about the cooking classes since HAL and ATK are not renewing their agreement - this is the response I received.
Thank you for your recent correspondence with Holland America Line regarding the ATK cooking class/demonstration and documents for your upcoming Grand Voyage January 5, 2020 onboard Volendam.
A replacement for the ATK cooking class/demonstration Mariner benefit has not yet been decided and unfortunately we do not have an estimated time frame for a new benefit to be introduced. We sincerely apologize for the disappointment this may cause and we appreciate your patience and understanding.
Please know that we feel a very special appreciation for our valued Mariners, and input from our guests is utilized in revamping our Mariner Society to provide more tangible benefits for our program. We welcome any suggestions and would be happy to forward them to our Management team for consideration.
I sent an email back asking if we would be getting any other benefit to replace the cooking class - waiting for a response.