Bathrooms are the perfect breeding ground for mold and mildew, and towels are easily susceptible to these serious fungi. It's OK to have a towel hanging in the bathroom as long as you change it once a week. Turning on an exhaust fan can help dry the room and the wet towel faster. Since bathrooms often generate mold and mildew, it's a bad idea to keep fabrics such as towels or robes inside permanently.
It seems like the bathroom would be the only place where you would keep your towel and robe, but that moisture will fall anywhere. A wet towel can quickly generate mold and bacteria and often cannot be dried properly if stored in the bathroom. Experts say hand towels should be washed every other day, and since I'm not convinced that all my family members use soap when they wash their hands, I'm going to follow that advice. Wet towels in the bathroom are a breeding ground for all kinds of rather unpleasant bacteria.
Keep a stack of hand towels in the bathroom so it's easy to change them to a new one. Unfortunately, the unlimited space in the bathroom isn't real. If you don't have a linen closet, it might make sense to store extra sheets in the bathroom near the towels. For that reason, items in this category will be individualized according to your lifestyle and the space in your home.