The experimental, folk-country monster pairing of Blitzen Trapper and the Parson Red Heads alone would make for a formidable evening at Revolution Hall, but tonight’s all-ages, fully seated show has a more philanthropic bent. The concert will benefit Do Good Multnomah, a local nonprofit working to assist veterans with housing by way of “relationship-building, one-on-one engagement, supportive services, and direct community participation.” Both bands are staples of Portland’s psych-oriented roots-rock scene and have transcended the city’s confines with their last several albums. Check them out and help a good cause at the same time. by Ryan J. Prado