Trying to find a story I read a long time ago.

[Mandrake]

I'm trying to find an old story I remember reading 20 or so years ago. Unfortunately, I forgot the title and don't know who the author is but I do remember what it's about. It's about two young women who work in an office and someone steals their shoes. It's told from one of the women's point of view. She and her friend are working late and are the only ones left in the office. She dozes off in the office and wakes up to find her shoes are no longer on her feet. She thinks her friend played a prank on her and stole them, but it turns out her friend is also missing her shoes. They wander around the office in their stocking feet trying to find their shoes but an invisible man keeps tickling their feet. I forget how it ends, but I think they wind up running away and leave the office shoeless. It was a great story and one I had completely forgotten about until recently. Sadly, I don't remember where I read it and since I don't know the title or author I have no idea how to search for it. Does anyone else here know what I'm talking about?