You'll probably be able to do that only at non-Disney restaurants located at DTD. I know some of the Swan/Dolphin restaurants (which are not Disney's) give discounts for DVC members, as do some of the Downtown Disney ones. I don't know about AAA but you might have better luck with those at Swolphin or DTD - inside the parks and at Disney-owned restaurants you'll get nothing for that. Annual passholders may get similar discounts. There are also some at the parks that give discounts for lunch or for entrees only for AP holders (usually on weekdays only). If you have an annual pass or are a Florida resident, consider a Tables in Wonderland membership - for a yearly fee of $75 for annual passholders you get 20% off your entire restaurant bill at most WDW TS and a few CS.