Jack in the Box tacos. It's that stuff you eat when you're out late, nothing else is open, and you've only got a buck to your name. This Tuesday, instead of 2 tacos for $1, you'll get 2 tacos for free after 2pm.
The offer is only valid on November 16, and there's no need for a coupon. Just ask for your free tacos, and voilà! That's it. No purchase is necessary. Mention it to your friends and any homeless people in the area.