"I walked into Baby Bugaloo with dirt on my legs and cloths from the dog park and Kiinnison treated me like her most valued customer despite my attire in her high end baby boutique - and she used my name in comments when talking to other customers like we were old friends!"

Being a high end boutique (even for kids) does not mean you should act like a snob. A welcoming greeting is by far the most effective invitation for your customers to shop, so why look down on them? Also, people like to hear their names being mentioned in positive conversations, so go ahead, chat and be friendly.