No problem taking a clothesline indoors in case you can't or don't want to take the laundry outdoors: https://en.m.wikipedia.org/wiki/Clothes_horse

This is a common way to dry clothes in Korea. I've only ever seen 1 dryer in an apartment the whole time I've been here. A typical dryer rack looks like this: http://newimg.globalmarket.com/PicLib/441/35441/prod/4_13501...

It's called 'evaporation'.

On a less sarcastic note: Water has no problem evaporating at room temperature. A batch of clothes is usually dry overnight. In fact you can even dry stuff at below-zero temperatures through sublimation.