My son is super social--he is out every Friday night, generally hangs out with friends during the day on Saturdays (golf, gym, lunch, football game, etc)
I think it probably doesn't help that DS doesn't love watching or playing team sports. He does like working out, and plays tennis and is on a swim team, but football/baseball/basketball isn't his thing. He will watch a little professional soccer, but doesn't love playing pickup soccer (he will shoot goals with the neighbor every once in a while).