Get Yourself in the Game!
There is ALWAYS a game of beach volleyball going on. Get in there! Don't be shy! Or, be prepared and bring your own net. You will definitely make new friends fast. Each of the places I have stayed had big wooden poles to tie your net around. It is definitely the better option over the flimsy metal poles in most volleyball sets. I learned this the hard way. A lot of drunk people who have no volleyball skills = broken poles!