We like to keep it fun but informative here at HotelChatter so our newest series, What is This? is devoted to odd-looking items in hotel rooms that upon first glance look as if they serve only a decorative purpose. But everything happens for a reason, right? And we're here to tell you what these things really do. This is a sticker of an arrow, placed in the bottom of the first drawer inside the closet of a room at Jakarta's hotel Alila.