Before you take that as snark, dear reader, allow me to add a few deets. Filthy Friends are a true supergroup made up of Corin Tucker (Sleater-Kinney, and various side projects), Peter Buck (R.E.M., ditto), Kurt Bloch (Fastbacks…), Linda Pitmon (Zu Zu’s Petals…) and Scott McCaughey (The Young Fresh Fellows…). They live in Seattle, Portland, and NYC. They concentrated on their new album (“Emerald Valley”) released last week. Add up the amount of performing years experience on the stage and the tally would reach well into a second century. In other words, they’ve each forgotten more about rock ‘n roll than any of us will ever know firsthand. They do their jobs and look like they’re having fun up there.