Massie's Underground Clinic for Kissing, more commonly referred to as MUCK, is a clinic Massie started in The Pretty Committee Strikes Back. She started it in order to prove that she was more experienced than Nina Callas. The members were Massie, Claire, Alicia, Dylan, Kristen, Livvy Collins, Olivia Ryan, Alexandra Reagan, Carrie Randolph, and Layne Abeley. However, Massie is forced to ask Claire for help, because Claire has more experience because she had recently kissed Josh Hotz.