All the best in your new venture!!
What kept me from shopping in one LQS was when I was a new quilter. I would go into the shop with my pattern and an idea but it always seemed that I didn't belong. Hard to put a finger on it but I was left to wander on my own and didn't know what questions to ask. When I selected my fabric I received service, not friendliness. I eventually found somewhere else.
So, chit-chat the visitors not necessarily with the purpose of making a sale. Let people come in and visit without buying because the next time they will make a purchase. Give advice if asked and use your intuition to find the "lost" shoppers such as I was.