Yup. If you go to the room right of Kistandalius for example, he'll tell you that those are his private rooms and kick you out, uh... teleport you out that is. Also commander Ralf has it and the The shopkeeper in Ars Magicana that sells potions (forgot his name). Maybe Blake has one too. I am curious if there might be something of good use in those rooms.. heck I dont know, a ring, a necklace, or a wapon, or a spell book...