Community media center Media Bridges celebrates its 20th birthday with the benefit show "Free Wave Riot: Celebrating 20 Years of Local Music, Local Voices, Local Media" at Know Theatre in Over-the-Rhine. Funds are being raised to launch the diverse, independent FM radio station WVQC: Radio Free Queen City, which is scheduled to hit 95.7 FM this fall. Saturday's concert stars IsWhat?! (pictured), Culture Queer, The Tigerlilies, J. Dorsey Blues Revival, Fourth Letter Gang, Losanti and others. Requested donation is $9.57.