This is based off the skits in Project Diva extend.
Air Baseball: Len beats Kaito. Miku beats Rin.
Rock, Paper, Sissors: Miku beats everyone but Meiko/Sakine Meiko who beats her.
Air Guitar: Miku beats Kaito and Haku, ties with Luka, and loses to Len. Len ties with Rin and Kaito (who got an idea). Meiko beats Rin. Neru didn't care.
Music Ability: Luka beats Len. Miku beats Rin and Len.
Posing: Kaito beats Len. Meiko and Luka beat Rin.
Gymnastics: Luka beats Rin and Miku.
Dancing: Sakine Meiko beats Miku