White Castle Craver Nation Rewards Program (FREE Sliders!)
Signing up at White Castle's Craver Nation site will score you two free Sliders (or $1 off frozen Sliders)! Sign up at http://cravernation.com. Plus, you'll earn points for Sliders for completing specific tasks on the website.
Not all states have a White Castle (mine doesn't), so folks who do will want to sign up. Here's a list of states that do have White Castles. Search for the nearest one to you here as you'll need to enter your favorite White Castle to sign up.