Scenario: exercise class with a group of women, they start talking about Nike, atheism, and the sad state of morals in America. It's obvious they are all in agreement. One turns her Nike shirt inside out to others cheering. Should I wear my Nike t-shirt to class next time? Lol.
Find the one with biggest check on it. If you have shoes, wear those. Hat? That too.
Two possibilities...one is, you wear your Nike shirt and learn there are more than a few other people with reason and logic in the class. Two, after that....you find a better venue for your exercise! You can't change their minds...you can only open them! Good luck!