Many Charedi stores have a sign on the door that women should only come in if they are dressed tzniusly (skirt, socks, shirt covering the neck and elbows, etc.). Some stores offer wraparound skirts to women customers who aren't wearing one.
A chiloni store owner put up a similar sign in the reverse direction.
You can only come in to the store if you are wearing only an undershirt and religious women can get one from the cashiers. I don't think this is serious but it is funny.