They resemble sun-beds, certainly. But if you lie on them in the daytime you will experience horrible and frightening dreams.
They are part of a new government tourist initiative to bring vampires in from Transylvania. When the light goes the bats come, as you may have noticed. Beware of any bats wearing T-shirts with slogans like "Suck it and See," or "Mine's a Bloody Mary." The worst kind of vampire bats are those with tattoos, but fortunately they mostly go to Sidari or Kavos.
Be especially careful this year of any stunningly beautiful pale women in white dresses singing Karaoke in tune in Condor Bar late at night. If they smile at you in a seductive, toothy way, avoid phrases like "Hi babe, you're drop-dead gorgeous."
Wise advice is to take garlic and a crucifix with you in your hand-baggage. Light-weight crucifixes are now available in most Duty Free areas or on board Thomson flights, which are generally staffed by Undead.
Whatever you do, do not lie on these fake "sun-beds," and if you do, be sure not to fall asleep or you will undergo strangely hot sensations: these are the mark of the Beast, and you will experience delusions and strange skin-peeling as the bat-juice which infects them softens you up for night-feeding. Safe places after dark are: Little Prince, because they're frightened of Dimitris; Nafsika, because Spiros kills them with his Specials Board; and Aquarius, because Glenn's jokes make them curl up and fall into a heap of despairing dust.