Tables in Wonderland is a discount card available to Annual Passholders for $75/year (currently). With the TIW card, you get 20% of meals at most Disney table service restaurants, including the alcohol, for up to 10 people.
As for holidays: I bought my TIW card on Saturday April 23 and they specifically told me I would not be able to use it for meals on Sunday (Easter). I was bummed because I had planned on using it for those meals, but figured that between that trip (a 3 day mom/daughter trip) and a trip with my boyfriend later this year, and marathon weekend in January, it would still really be worth it...
On Easter, I decided to try it just in case....I successfully used it at Sci-Fi Dine In Theatre at DHS and at Narcoosee's at the Grand Floridian. The best part?? My savings over the three days we were there paid for the card...so any future savings are gravy. Yay. (we did table service for lunch and dinner each day).
However, I think the previous poster does have a point about a larger party attracting more attention--may be more likely to get the rule enforced..So I would defintely EXPECT that you won't get the discount, and then if you DO get it, you will be super happy and excited. Hopefully it will go in your favor!! But if it doesn't, I hope that you will benefit enough from the card over the week to make it worth it...I was pleasantly surprised how quickly the savings added up and there were just two of us.
Good luck and congratulations!! Have a wonderful time!!
Brooke