If it is like a theater or such you could wait for the crowd to thin out, be one of the last to leave. For going in how about entering close to the start or if you can get seats on the aisle. Can't think of anything else but if I do I will post.

Jaml is right, I try to get to places early or if leaving, letting others especially with children go first and staying seated until I can move w/o bumping into people.

Any ideas of how to avoid this painful problem while shopping?

When I go to the movies I go early to avoid the crowds and wait until people leave

Hi Sammy, wish I could give you an answer. Instead I can at least give you understanding. Sending gentle hugs your way.