We spent a few days on Perissa beach, a couple of days we used the sunloungers which seemed to belong to one of the hotels on the beach front. This cost us 7euros per day. Another time we used the loungers that belonged to Tranquilo and it was free because we had lunch at the restaurant. The beach was pretty quiet in early July, except that every minute we were being offered massages by Thai people, sunglasses, bracelets and god knows what else. There were less lucky lucky men at the Tranquilo end of the beach!
Also the black sand is very very hot.