Deanna is a goodwill machine, improving the lives of everyone on campus: She brings her socially phobic roommate (Heidi Gardner, a witty skulker) out of her shell, and even gets the poorly written mean girl (Debby Ryan, of Disney's "Jessie") to rethink her entire worldview. This is after the '80s party dance-off in one of the many frat-party scenes. As for Jacobs, best known for "Community" and "Love" and the excellent Mike Birbiglia comedy "Don't Think Twice," she provides a screwy, eccentric charge of energy throughout. Some of her nonverbal reactions are so big, you can't believe she's even attempting them. But her character (a math-challenged student recently out of an eight-year coma) supports them, sort of. Watching "Life of the Party" you may find yourself wishing for a spinoff comedy for McCarthy, Rudolph and Jacobs on their own, as renegade guidance counselors or something.