If we were to do a group cosplay, Naruto would be the easiest, since there are so many different character from that show, and almost everybody has a head band. Inuyasha's good too, but there aren't that many characters, we'll end up with 4 or 5 inuyasha, 7 or 8 Kagome, even more Kikyou and Miroku.
um...I've got a Kimono too, it's for Tomeo cosplay, but it works in general too, well, I'm down with the idea of doing a huge group cosplay, just let me know what.