1967, Pink Floyd performed at the Locarno Ballroom in Coventry, West Midlands, England. 1968, Steppenwolf make their first appearance on American Bandstand. 1968, The Yardbirds played at the Grande Ballroom in Detroit, Michigan. 1968, Mary Hopkin won her heat on the ITV talent show Opportunity Knocks. She later signed with The Beatles owned Apple Records, Paul … [Read more...] about Today in Rock History – May 4