This is the DDE everyone refers to. Present your card prior to your server putting your bill in the computer, or you may need to wait for a manager. It is good for up to 10 people on your check. Here's some more info on the AP Discount for the card.
Remember the card is available to Florida Residents or Annual Passholders only.
The blurb below applies to Annual Passholders.
DISNEY DINING EXPERIENCE:
Become a member in the Disney Dining Experience program for $50.00, a $25.00 savings off of the regular price.
The Disney Dining Experience gives you:
20% off of food and beverages at over 70 Disney Resort hotel and Theme Park RESTAURANTS. (Discount is good for up to 10 guests.)
Theme Park and Resort parking for dining purposes
Member-Only invitations to exclusive events
Annual Passholders can join up by calling 407-566-5858 (Mon-Fri, 9:00am to 6pm EST). The Disney Dining Experience is not accepted during holidays, including New Year's Eve, New Year's Day, Easter, Mother's Day, July 4, Thanksgiving, Christmas Eve and Christmas Day. Please allow 2 to 3 weeks for processing.