EVANSTON—James Norton woke up in the hospital Sunday morning after new group N(e)Urythmic’s Saturday night performance with two full leg casts and a throbbing headache. Nick Simons, a fellow group member, charged him with a baseball bat while he was changing out of his sequined leotard. The motive was apparently related to the wild success of Glee, the new Fox television program. Simons said this morning that he just couldn’t stand the pressure of the Northwestern a cappella world. “Nothing