As soon as you get your S & S card, it will have your dining room and table information. Go and check out your table, IF you want a change, go to the Maitre 'd right away. We have always been able to get a change when we have wanted one, in one case not until the second night.
There will be wine packages for sale usually outside the dining rooms and you can ask your waiter at dinner the first night. If you have Cheers package, wine by the glass is included up to a certain price point and then there is a discounted price.
Check the deck plan and information for your ship on the website; there might not be thermal suites available.
Unlimited free laundry is available to diamonds; 3 free bags for plats; laundry is available for a charge otherwise. Ask your steward.