"not being allowed into the shop until you'd said hello to the sales staff who were under pain of death to greet every customer with an uncheery "Hello""
Well not entirely friendly.
Went into a South London branch a few years ago wearing an open-faced crash helmet.
I was asked to remove my crash-helmet. No problem you might say, except for the half dozen youths in there with hoodies and scarves around their faces. It wasn't winter and it wasn't a robbery!
I asked whther their hoodies were being removed. hen they answered no, I left saying that it was clearly a racist and prejudiced policy - which it plainly was as all the other customers were of the same apparent ethnicity as the staff.
Not sorry to see the back of them finally.