Hey, when you take the amplification off lots of rock songs, most of them are folk songs so lets get beyond this us v. them thinking here.
What, do you really thought that Elvis wrote "Hound Dog"? Wanta buy a bridge?
Back in my pre-blues days I used to occasionally finish out with a medley ofr the Beatles "I'm a Losser" going into Buddy Holly's "Peggy Sue" and into an original "Amtrak Blues" and letting it fold back into the Beatles song. Worked fine and allowed for a little improvising as to get from one to another seemlessly...