Just back from a week in Skiathos, and a bit mystified about the prices charged for sun beds on the different beaches. Single traveller a visit to Agia Eleni cost me 5€ for one bed, Agia Paraskevi had to pay for 2 beds at a cost of 8€, not too impressed with that at all. Another family of 3 arrived nearby so I offered them the spare bed which they happily took. Along comes the guy again and tried to charge them for 3 beds! The only beach to charge me 4€ was small Aselinos.
As a solo traveller I feel I always end up paying more for accommodation which I understand to a degree, but on the beach towards the end of the season, not at all.