Love your Iggy avatar Doreen! It's tempting me to change mine to
this to keep the Star Trek theme going.
I don't think there is any wiring in the baseboard wall, but I should check... that is a really good point.
It isn't really a spare bedroom. Technically the house has three bedrooms, one downstairs and two upstairs. This is the only closet upstairs. In reality the upstairs is divided into one distinct bedroom, with a door that closes and everything, and which we use as our bedroom (but we give it up on the rare occasion we have houseguests... for complicated reasons including our house's layout and our cat). The rest of the space is pretty much open although technically it counts as a bedroom since there's a door that closes off the space from the stairs. I use the second "bedroom" -- the open space -- as my workspace, dressing area, etc. This long closet sits opposite the upstairs bathroom and in between the two bedrooms.
It's a really weird layout, I think partly because it's a half floor and there's only so much you can do to work around the slanted ceilings, and partly because whoever finished the upstairs didn't really think it all through.