Elevator or Stairs?

If you were presented with the option to take the stairs or elevator what would you do?

Obviously some things need to be considered, such as:
- how many floors are we talking about
- what's the ultimate destination
- am i going up or down?

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Elevators were created for convenience, so if the opportunity to be lazy presents itself I say take it.
Plus who knows who/what you'll encounter on your ride:
- your boss, a cute girl, two cute girls, your friend, farts, burps, bad BO, music, no-one...

I'm of the opinion that stairs should be taken in certain scenarios:
in case of fire, freestyle walking, skateboarding, to get to cool underground bar/nightclub, to avoid your boss, to avoid co-workers + possibly for better health...

Your Thoughts?