Performing for residents Posted on April 22, 2015 0 Bill Perk performs at Hardin Hills. Bill Perk plays guitar, sings and tells jokes during his recent visit to Hardin Hills Health and Rehab Center. Christian Brothers and Sisters (CBS) performs at Hardin Hills. Residents of Hardin Hills Health and Rehab Center were entertained by the group CBS (Christian Brothers and Sisters). They sang many songs and the residents are looking forward to their return.