Cause they can
NM 's clientele determine their hours. Most high end retail stores cater to clientele that shop during the day, not after work. Ergo, no need to stay open late for the working crowd.
Neiman Marcus is in a league of their own. They don't have to stay open late and they don't have to advertise on television. It was a privilege to be employed by them for 9 years.
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