My first two darkrooms were in bathrooms. The first one was in a rented flat. The usual set-up with a board over the bath to hold the trays. For a print washer I used one of those plastic-coated metal shower caddies, which I bent into a shape with side arms to hold the sides of the prints, a bottom edge to hold the bottoms, and a twisted loop at the top, which I put the flexible hose through to wash the prints. My third bathroom had the dark part without running water in an outside shed, for loading film and printing, and the rest inside in a small bathroom - film processing and print washing basically.