Over several years of regional touring with Powerhouse, Kay performed with or opened for Bonnie Raitt, Muddy Waters, James Cotton, Big Walter Horton, J. B. Hutto, John Lee Hooker, Frank Zappa, Captain Beefheart, Blood Sweat & Tears, NRBQ, Bob Margolin, Janis Ian, The Nighthawks and many others.
Kay's extensive touring experience with Powerhouse involved sharing the stage or opening for prominent acts such as Bonnie Raitt, Muddy Waters, James Cotton, Big Walter Horton, J. B. Hutto, John Lee Hooker, Frank Zappa, Captain Beefheart, Blood Sweat & Tears, NRBQ, Bob Margolin, Janis Ian, The Nighthawks and many others.