An appearance by the cast of MTV’s Jersey Shore sparked chaos in Montclair, N.J., New Jersey’s Star-Ledger reports. Reality stars Snooki, Mike “The Situation,” Pauly D, Vinny, Ronnie, Sammi, and J-Woww appeared at a Jan. 22 “Meet the Jersey Shore Cast” event at Montclair’s 501 Lounge. While the club has a capacity of 800 people, closer to 2,000 fans showed up, and fights soon broke out. Police told the Star-Ledger that four arrests were made for disorderly conduct and driving while intoxicated.