: FREE Big Burrito Especialsm offer valid at all eight Las Vegas locations only on Thursday, June 3, 2010. Limited to one Big Burrito Especial per person and is subject to availability. FREE Fish Taco offer valid at all six Utah locations only on Friday, June 4, 2010. Limited to one World Famous Fish Taco® per person and is subject to availability. Not valid with any other discount/offer. No substitutions. No cash value. No coupon necessary for redemption.