One may think of walking fast; people will move even quicker out of
the way and also won’t mind a collision too much.
But of course, don’t bump into elders or children, or anyone else… It’s
all pragmatic… If the crowd is so big that walking
fast won’t work, then you might need to walk slowly.
After weighing, I still think it's better to walk. Running only makes
sense if there is a time limit. Otherwise too much energy consumption,
and you will have to slow down for a while, which defeats the purpose of
running in the first place!