We have a large walk-in shower, 6x6 feet. Any bars would be mounted on the wall opposite from the showerheads. We currently use four 3M Command metal hooks, for four towels, but my wife is annoyed that the hooks occasionally fall down and the strips have to be periodically replaced. I personally think the towels dry faster hanging from a hook than folded over a towel bar, but what do I know, apparently.