The Doobie Brothers headline One Cause Benefit by PRS Guitars for the Johns Hopkins Kimmel Cancer Center. The Doobie Brothers recently celebrated the 40th anniversary of their propulsive roots-based, harmony laden, guitar driven style that sold an estimated 40 million records over the course of four decades. VIP Preparty features appearance by band, guitar auction, catered small plates and mixology by American Harvest Organic Spirit. One Cause is the flagship benefit of PRS Guitars. The Living with Cancer Resource Program offers education to cancer patients and families at Johns Hopkins - free of charge.