what are your limits on taking the lift? i work on the 3rd floor (the USAians call it the 4th) but it's basically 6 floors high due to high ceilings and stuff. i take the stairs most days but others take the lift for one floor. able bodied chumps too.
the escalator is fair enough though, yes? like... at tube stations?
i remember when i went to the hospital as a kid they had these posters that said "if you walked up and down the stairs every day for a year you'd have climbed ben nevis 5 times" which were pretty cool.