Shawna Potter, lead singer for the punk band, “War on Women,” tackled sexism and harassment in lyrics and on-stage. Then she began leading workshops to educate concert and festival attendees.Now Potter has written a book, a practical guide to help clubs and community spaces create safer environments for marginalized people. It’s called, “Making Spaces Safer: A Guide to Giving Harassment the Boot Wherever You Work, Play and Gather.”