Washing hair when going out

Do you always wash your hair when you go out?

Do you all wash your hair every time you go out to meet someone, not just going out in front of the house or running quick errands?

My hair is so fine and weak that if I tie it up and then let it down, it leaves a mark.

So, I absolutely have to wash my hair to style it, so even if I wash it at night before going to bed, I have to wash it again when I go to meet people.

Otherwise, I felt so uneasy that I couldn't get my work done.