several NYC yarn stores are not on 'street level" some, like seaport yarn, have almost no indication that there is a yarn store in the building!
street level stores have high rents, and often are small, (Purl is a jewel box, a wonder store, but slightly bigger than a postage stamp!)
the off the street level stores are often bigger, (seaport!) but not 'normal' the store is "office rooms" filled with yarn!..
so expect to see very different stores in NY!