No this has nothing to do with the D+ drinks. We've always got free coffee in the Diamond Lounge, but
this TA had 700, about 1/3rd of the ship being Diamond or Diamond Plus, so they opened up the coffee
shop to the Diamond Members.. They had also done this on my previous TA on the Harmony of the Seas the previous Nov 2021. I hope the same happens on the Oasis of the Seas on the TA in April, 2024.