If you are interested in a galley tour (adults only - free) - you can ask guest services or the concierge team when you board if one will be offered during your cruise, and you would receive a ticket for that as well, or at least given the day/time/location to meet. It is pretty cool to see the kitchens behind the scene, but I'm not sure if they offer it every cruise or not. I have never seen it advertised, so you won't know until you ask. Mixology and tastings are a must if you are interested, as I've found they fill up fast. Some spa treatments can also only be booked once on board, I think.