SallyC Boston ferns (Nephrolepis exaltata) make great bathroom plants and also Snakeplants (Dracaena trifasciata)
Support SallyC's recommendations are both good. If you go in to advanced search and select moderate, high or high humidity and your bathroom's lighting level, eg. dappled lighting, that should bring up a list of plants that will be suited.
Rosaline Thx for the suggestions. I like the look of the Boston fern, so I'll try and locate one on my next shopping trip.