The success of Los Campesinos! can be traced to one thing: the Internet. Not only did the indie-pop band from Cardiff, Wales first garner acclaim on MySpace, but it draws its influences from groups (Pavement, Yo La Tengo) that feed the alternative music world's blogs and e-zines. And the band doesn't only rule in cyberspace. The seven-member group--which includes a violinist, guitarists, and even a melody horn--commands a stage with its energetic live shows. 8 p.m. The Bluebird Theater, 3317 E. Colfax Ave. 303-377-1666, $13.50-$15