Do notYou mustn't paint your nails!

I worked for a rental video shop until last month. The shop did not allow the employees to paint their nails. But I’ve quit, so now I can paint my nails now! I’m wondering what color I will paint my nailsthem. Pink? Blue? Red? Green?

One of my friends from the U.S. said that the shop’s rule to forbid manicure was a typically Japanese one. They don’t care what color people at the rental video shop paint their nails, right?

I wonder what people think about the shop’s rules. For example:
Don't You mustn't paint your nails.
Don’t You mustn't dye your hair.
Wear beige cotton pants.
Tie your hair to keep it out of your face, but you must use black or brown bands.
I think they are too strict, but they these rules are not unusual in Japan.