by a type of rock 'n roll that rhymes with "rock" and begins with a "c" but i won't go on further, they were willing to play with those guys and succeed on their terms. >> the stuff from the '60s was like, oh, that's way too hippie, now we have to up it a notch. >> the audiences have come to expect a better standard of performance, better quality of lighting and sound and staging. they've come to expect a show. >> in the '70s, the groups started to become more theatrical. they realized that just giving them the music isn't enough. we've got to give them something to look at.