Jamband super group The Contribution have confirmed a West Coast date. The group will perform at Mill Valley, CA’s new Sweetwater Music Hall on Friday, May 4. The side project’s current lineup features Railroad Earth’s Tim Carbone (violin, guitar, vocals), New Monsoon’s Phil Ferlino (keyboards, vocals) and Jeff Miller (lead guitar, vocals), String Cheese Incident’s Keith Moseley (bass), Black Swan Singers’ Sheryl Renee (vocals) and Everyone Orchestra’s Matt Butler. Sweetwater Music Hall supports the San Francisco Bay Area Musicians Fund, the regional chapter of Sweet Relief Musicians Fund. A portion of all ticket sales will be donated to the non-profit charity organization, which provides financial assistance to all types of career musicians who are struggling to make ends meet while facing illness, disability or age-related problems.