While researching Shoney's birthday freebie, I found myself completing their wikipedia entry and thinking “hot damn, this is a boring company.” Luckily their offer of free dessert is all the excitement I need.
No, wait, that's just a sugar rush. Close enough!
Signup Freebie: Free appetizer
Birthday Freebie: Free dessert with adult buffet or entree
See that link in the sidebar that says Birthday Freebies? I bet it has a few more offers like these 🙂