One of the three elevators is down for two weeks for maintenance, which is putting extra load on the other two. I tried to convince someone to put up signs encouraging those only going up a floor or two to take the stairs, but even though she sent around an e-mail suggesting she'd worked out having the necessary doors unlocked, it doesn't seem to have happened.
I'll take the stairs down on my way out, but it'd be tough to get in the habit of climbing up to the 7th floor -- at least with my laptop bag, which gets pretty heavy after a couple of flights.