[wild1]

From wiki - i am sure there is more to this story.

On 27 August 1965, the group arrived at a Bel Air mansion to meet Elvis Presley. Biographer Peter Guralnick maintains that Presley was at best "lukewarm" about playing host to people he did not really know. Paul McCartney later said: "It was one of the great meetings of my life ... I only met him that once, and then I think the success of our career started to push him out a little, which we were very sad about, because we wanted to coexist with him." Marty Lacker, a friend of Presley's, recalls the singer saying: "'Quite frankly, if you guys are going to stare at me all night, I'm going to bed. I thought we'd talk a while and maybe jam a little.' And when he said that, they [The Beatles] went nuts." The group told stories, joked and listened to records. The five of them had an impromptu jam session. "They all went to the piano," says Lacker, "and Elvis handed out a couple of guitars. And they started singing Elvis songs, Beatle songs, Chuck Berry songs. Elvis played Paul's bass part on "I Feel Fine", and Paul said something like, 'You're coming along quite promising on the bass there, Elvis.' I remember thinking later, 'Man, if we'd only had a tape recorder.'"