Offer valid at all participating RAMBO locations on Friday - December 26 starting at 6:00 p.m - and while supplies last (50 classic or special burgers offered per participating location). Personal offer, valid only for customers who come in person and present a gift wrap. Offer valid once per customer. The free burger may be chosen from the following: the classic cheeseburger, the special cheeseburger, and their equivalent vegetarian versions.