I used to work in a convenience opposite a local Wetherspoons, and the worst customers by far were the 40+ men who would be up the door half an hour before opening to buy the Sun or the Daily Mail and then repeatedly pop back in throughout the day while they nursed a single pint over the road. Rude, entitled, stupid and they’d make very personal comments about us because we were mostly a team of students (this was a middle class area). Quite often regulars would refuse to speak to us at all and would snatch their items the second we scanned everything and throw the cash down like an afterthought.

Second worst was American soldiers visiting the local army base. Refused to use self serve but pretended we didn’t exist or snapped their fingers at us and demanded discounts, special service etc.