If one plays "Smoke on the Water" at Norman's Rare Guitars in L.A., odds are you will be asked to stop. Same with "Stairway to Heaven" or the open to "Roundabout".
Haven't played for a while (neuropathy is playing hob with my left arm) but typical warm-up would be the riff from "Day Tripper" or "Crazy Little Thing Called Love" (get the right wrist supple). Thing is, I'm horrid and won't play in front of people.
@MichaelRea could speak to this!