still staying. Plenty of hotels leave a small card explaining it, and the wording is usually some version of floor means replace, hanging or on the rack means reuse.
So the smart move is boring: read the card in your room before you guess. The logic is about cutting down on water and laundry loads, which is why so many places run these little reuse programs in the first place. Rehanging a towel you’ll use again tomorrow means it doesn’t get washed for no reason.
I’ll admit I got this backward for years. I grew up with someone who always bunched the towels into the tub on the last morning, so I copied it without thinking, everywhere, every trip. Then one stay I actually read the card by the sink and realized the tub-pile I’d been so proud of was basically shouting wash everything at housekeeping the whole time. Not