C/D: Bands performing albums in their entirety

how old does the record have to be

I don't know but it looks like the typical Green tour setlist contained 0-1 Murmur songs.

The R.E.M. story is great, though, because like I said, I don't think it was a thing that was really done at the time and the audience didn't know they were going to do it. It just became clear little by little after they came out and opened with "Radio Free Europe," then did "Pilgrimage," and then little by little it became clear to the audience. It was in Atlanta; Peter Buck said that people in the audience were howling.