You could argue that forgoing the wash and blowdry is taking money out of the local economy, but I´ve got an answer for this! I plan to get up-styles more often for weddings, balls etc, where before I would have just done my own hair, nothing, timed it to be just after a hair cut or asked a friend to put my hair up. I am not doing it specifically to keep local small businesses alive, so much as to treat myself/polish my look, since I won´t be wearing new clothes and shoes! (Now I just have to figure out where I stand on bobby pins and hair spray, and get the smell of cologne* out of my hair).
*I don´t remember this from the other times I got a dry cut, so I guess it depends where you go.