Young couple sailing in Greece

Hi there,

My finance and I are looking to head to Greece for a sailing trip around the islands in August / September. We have heard that there are sailing companies that put together the crews on their boats according to how old people are and whether they are single or couples.

Essentially we were hoping to sail with a group of mid 20's to mid 30's couples for a week but we've had a lot of trouble finding a company that caters that specifically.

Have we been misinformed or can someone advise where to start looking.
Thanks in advance.