Where to hang towel bar, towel hook

I purchased a towel bar and a towel hook to install, but I’m torn on where to hang them. There is a light switch where I would ideally hang the towel bar (almost exactly 48 inches up). Would you place the towel bar by the shower and simply hide the light switch, or would you place the towel bar on the wall by the sink and leave a hook near the shower?

Thanks!