I don't remember now which ship it was
that we had the pool towel in the cabin but although initially thought
it was a pain turned out I actually liked it. The only reason being was that
it eliminated all the confusion of people leaving towels on poolside seats
making knowing if a chair was in use or not annoying.

How can a chair be "in use" if no one is there and no one in the chair next to
it is obviously holding it for the BRIEF time the occupant is using the rest
room or grabbing a quick snack to bring back?