This is a view from the top of Coit Tower in San Francisco. It takes many minutes to make it up there. It's a tight space, and not many elbow room available. I know I should say "not a lot of elbow room", but if you're there, I think you'll see the elbow room is very much quantifiable. You go in circles, and then you have to line up again to go out. That also takes many more minutes before you make it to the sardine-packed elevator.