Their washroom is evidently out of order, even though there's no sign saying that on the door - only signage is "Washroom for customer use only" posted on the front door.
I'm assuming they've had problems with people making a mess and have just instructed the clerk to lie to people about the washroom being out of order. They have to at least provide washroom facilities to the clerk..
The clerk also does not speak to you except to inform you how to swipe your card; no "hello", no "your total is $10.95", nothing. Not very polite. read more