There's no way you need to organize something to be considered a leader. I haven't organized a single party except my b-day party (which I had together with a pretty hot girl friend of mine - it's a good idea for others....if you celebrate something with a cool chick, other chicks notice you) and I still can see myself having higher status than most of the males around. I think it rather has something to do with your general reputation in your social circle - girls see me as a player, guys see me as a player. I don't know about a single guy who would have higher status than me, but I can feel there's cca. these 20% of us guys (including me) above the rest. No one is dominating though.
On the other hand, most of the guys here who organize most the parties are 100% providers and that is something you don't want to become. Only one high status male from the social circle organizes parties, but he has game. The other "leader" guys simply come to the parties and pick up the best chicks.
Anyway, what rastafarian said is just what I would do if I wanted to host a party.
