Judicial notice

"...speaking of college students generally the court observes that it is a matter of common knowledge and well established that groups of students are for the most part exuberant, boisterous, and hilarious, and that they do not ordinarily keep regular hours and are addicted to the use and abuse of vibrant and sonorous musical instruments."

City of Long Beach v. California Lambda Chapter of Sigma Alpha Epsilon Fraternity, 255 Cal.App.2d 789, 796 (1967).