Today 4/16 (in Houston area - check your location for participation) Papa John's is having a Buy 1 Large Get 1 Large Free pizza deal. At my location, their Specialty pizzas are $15.49 regular menu price, so you could get two for this price!
Order online for delivery or carryout at papajohns.com and use promo code FREEPIE.
While you're online (and before you order) register for their My Papa Points program. You can earn points with each order and score FREE PIZZA! I've already accumulated enough points for a couple of free pizzas, and I've only ordered when pizza is B1G1, so it's easy to get free pizza!