Speaking of elevators...when I used to train people at one gym, they had an elevator. I used to take new clients on the elevator all the time...haha Of course, people would laugh and wonder why a personal trainer was suggesting the elevator. I'd then say, that's the secret to good calves.
In actuality, taking a flight of stairs here and there does absolutely nothing. If your heart rate isn't elevated for more than 3 minutes at a time, it's not burning anything significant. The best is when someone thinks that cause they walked around all day shopping, they actually did some worthwhile physical activity. You could walk 6 miles, but if you stop every 50 yards, it really isn't that beneficial.