i wear flip flops all the time, it doesn't diminish my coaching ability because i don't like tennis shoes in the summer. Remember, most coaches are volunteering their time....start paying them 20,000 a year and then you can tell them what they can and can't wear. I understand some rules are needed to keep the team running smoothly but attire and when you can and can't talk to other parents...come on!! Why not just say thank you very much for donating all your time, knowledge, and money (most still pay the team fee for their kid to play even though they are coaching) to the girls and the team???