When Beca's father discovers she has not been attending classes, he comes to her with a proposition: if she joins a club and still does not want to remain at college after one year, he will allow her to leave college, and he will pay for Beca to move to Los Angeles to pursue her music career. After some persuasion from Chloe Beale (Brittany Snow) the co-leader of the Bellas along with Aubrey, she reluctantly joins the Barden Bellas. Aubrey does not initially approve of recruiting Beca, but yields nonetheless due to a desperate need for members and Beca's talent. Beca joins alongside a group of other women who do not fit the Bellas' typical mold: Cynthia-Rose (Ester Dean), Stacie Conrad (Alexis Knapp), Lilly Onakuramara (Hana Mae Lee), and Fat Amy (Rebel Wilson). Jesse is also revealed to have joined the Bellas' all-male rival group, the Treblemakers, but his roommate Benji (Ben Platt) was rejected after being called weird by Bumper (Adam DeVine).

Answer this question: what is the boy group in pitch perfect called? Let's think fast. Stream of consciousness:
The important part for answering this question is: Jesse is also revealed to have joined the Bellas' all-male rival group, the Treblemakers, but his roommate Benji (Ben Platt) was rejected after being called weird by Bumper (Adam DeVine). So the final answer is the Treblemakers.