Fast food restaurants like Carls jr. and Mcdonalds. They have messed up my order i dont know how many times. And that includes giving me my change back and messing up my total amount etc. They are also not so courteous to me and other customers for some reason at times. The two things i would suggest is to serve the customer with more manners and try not to mess up peoples order. And to keep their restrooms alot cleaner with better maintenance. Because there have been complaints that their restautrants are not very clean to dine in also.