HI char,
I'd pick the following three:
Me And BobbyMcGee:
Even though he didn't write this one, I think it would sound great performed live, and it's on the same album as Saturday Clothes.
Affair on 8th Avenue:
All choking, mumbling, sneezing, standing up etc. needs to be forbidden during this song.
and
A Tree To Weak To Stand:
Because it's one of my all time favorite songs and I'm listening to it at the moment.
and as three are not enough, I'd like as an encore:
Boss Man.