Complex sentence: Owner Richard "Tres" Shannon III has remained a prominent figure in Portland, opening Voodoo Doughnut, and a regular performer at Dante's, running for Portland Mayor and City Council, and founding the innovative karaoke band Karaoke from Hell.
Split into simpler sentences: Owner Richard "Tres" Shannon III has remained a prominent figure in Portland. He has also run for Mayor of Portland and City Council, and founded the innovative karaoke band Karaoke from Hell.