Although I anticipate many of my friends to buy and play Destiny, I joined a clan (Astral) to expand the number of people that will possibly be on at the same time as I am. Also, Raids are for 6 people, and being in the clan allows for people to plan times and days better, especially having a forum/website. The best case scenerio is that my PSN friends join the same clan that I am in. Since I am in a clan, they can click on profile and see what clan I'm in and follow link to clan.