Thanks @@acw271011 - we figured it out. It wasn't on our list, but we found it on the website and booked our welcome cocktail there today. So glad I read your thread!
@@acw271011 - I keep seeing you refer to the Zky Terrace - I just want to confirm you mean the terrace outside the Zky bar? I didn't realize you could book that. It's not on my Ceremony or Reception lists.