[MarchHare]

Originally Posted by Arya Stark

Why would it need a razor?

I'm just repeating wittynickname's comment from page 2:

Originally Posted by wittynickname

Speaking as an actual professional with actual understanding of how haircuts work--the 'hard part' haircut that this woman was seeking is 1) extremely popular right now and 2) a very difficult look to achieve and in some places cannot be done legally by a stylist, only a barber, because straight razor cutting is involved, and at least in Pennsylvania, barbers can use straight razors, stylists legally cannot.

She was looking for a highly specialized service that a barber such as this type would be able to achieve. Again, I agree--had she been looking for a typical feminine haircut/style/etc, this is not the place for her. She was looking for a men's haircut, so she went to a barber who specializes in the men's haircut that she wanted.