A few restaurants offer discounts for members of the American Automobile Association (AAA) or the Canadian Automobile Association (CAA).
Some of the discounts below may be intended only for those who have the AAA Vacations Diamond Card, which you get if you book your vacation through AAA. However, there seems to be some confusion about this, and sometimes people have used a regular AAA card at the same location. I am honestly not sure which card is actually required for the discounts below, as I've had mixed experiences myself. It may depend on the restaurant employee and how well they understand the discount program. So if you have only a regular AAA card, give it a try, but if the restaurant employees say no, accept that they may be correct.
Most of the Swan and Dolphin hotel restaurants will give you a 20% discount on food only (not beverages). The Swan/Dolphin restaurants that do NOT offer this discount include Il Mulino and Shula's.
Downtown Disney restaurants:
15% discount at Earl of Sandwich
10%-15% discount at Ghirardelli Soda Fountain
Most Landry's restaurants (including Landry's Seafood House, Oceanaire Seafood Room and The Crab House, but NOT Rainforest Cafe, Yak & Yeti or T-REX) offer a 10% discount on food and non-alcoholic beverages for AAA members. Valid for up to six people, including AAA member, per AAA membership card. Offer excludes tax, tip and alcoholic beverages. Not valid with any other offer, promotion, or discount. Thanks to Marlene for info.