Though I have commuted on my recreational/sport cycling bicycle, with clips. (My wife and I work at the same place, and she would play softball some afternoons - so I'd often pack the bike in the car, drive in together, then I'd ride home while she went to softball.)
Yeah, I've got some Crank Bros pedals on my utility bike that are flat on one side and clip-in on the other, and have clipped in while commuting. I'm well aware of how weird I am, though.
Ah I put that style on my mountain bike and my gravel bike - the mountain bike (which was used) came first and just had steel pedals, so I wanted something clipless, and that seemed like a good compromise for potentially using it to roam the neighborhood looking for our dog when he runs off.
The gravel bike I just built over the winter, and its main purpose is for touring, but I figured I might use it as transportation at certain events we sometimes go to, which are often held on large fairgrounds that require a lot of walking to get from one end to the other.