If on an escalator, especially on visits to London for meetings, I always go left and vigorously climb the escalator. I do have favourites, such as the Holborn underground escalator which is the longest in London. If I feel really fit I’ll take two stairs at a time, it’s a race for me!
You can get quite a workout on these long escalators, especially if carrying a backpack or briefcase. Impressive metrics can be seen on your fitness tracker or smartphone.