"One Room Disco" (ワンルーム・ディスコ, Wan Rūmu Disuko) is the ninth major single by Japanese band Perfume. It was released on March 25, 2009 as a CD-only version and CD+DVD version. The single reached number one on the Oricon weekly chart on April 1.[1] The limited edition CD+DVD version included a form that, when filled out and sent in, entered fans into a draw for prizes such as a backstage pass, a visit at home by Perfume, "Perfume Original Goods" gifts, and T-shirts.[2]