I wouldn't say we really mingle, but there's a network to support the wyrdome. The average person doesn't know the witches in the fairy tales are not only real, but also protecting them from vindictive spirits and the like.

We have a version of the Mask in our world, to protect both sides of the equation. Not everyone understands that magic has laws, just like science. There's just a couple of places where the officials know it's better to just not ask, and approve the rare strange request. Like the blood banks never advertise what happens to blood that isn't used for medical purposes.