take the stairs!

my school is on the 1st floor (2nd for the Americans), yet people still take the lift to go up or down. i don't get it. it's only one flight of stairs! and let's face it, some people really could do with the exercise. which is funny, cos my gym is on the 2nd floor (of another building altogether). people actually pay a membership to go to the gym to get or stay fit, yet take the lift up and down. seriously, what's the point?