Instructables user br3ttb used 60 rubber bands to make a travel clothesline by soaking the rubber bands in water to make them more pliable, separating the bands into three even piles and tying each pile into a long strand, and braiding the strands together.
The only trick with using the clothesline is hanging it up. You can wrap the entire clothesline around one object and run the rest of the line through the loop (check out the post for pictures).