A football coach who alleges he was assaulted by a purportedly intoxicated parent tailgating a football game does not have a claim against the University of Chicago stemming from the incident, a federal judge held.However, a federal sex-discrimination charge against the university and charges against the parent can proceed, Chief U.S. District Judge Ruben Castillo found.In a written opinion last week, Castillo dismissed a premises-liability claim that former UC assistant football coach John Bear brought against the …