Without helmets. And often in just shoes — did you ever try walking in shoes on an ice skating rink? I guess it gets simpler with practice, still I wonder how many more % concussions and damaged wrists the cold weather caused
There's the odd winter where you get ice smooth and snowless like a rink, but rare.
Used to walk around on ponds and lakes quite a bit as a kid.
Ice that is rough is easier to walk on.