Complex sentence: The party, dubbed "Mitch-A-Palooza," is a huge success and puts Mitch and his friends at the top of the college social scene, causing these former college buds to revert back to their frat-boy days.
Split into simpler sentences: The party, dubbed "Mitch-A-Palooza," is a huge success and puts Mitch and his friends at the top of the college social scene. Causing these former college buds to revert back to their frat-boy days.