I just walked into a Wal Mart Neighborhood Market that requires masks, without a mask, and the person at the entrance said I need to have a mask and tried to hand me one out of her box of masks, and I just ignored her and kept walking. Was able to get what I needed without a mask and wasn't kicked out or anything.
No idea why people at this point STILL believe masks work or make any difference.
I usually just ask them if they have a gun. If they say no, I tell them to have a nice day