He's officially stuck with a women's gym membership. Can he fit in as long as he follows the rules?

Charlie’s company finally did something right — granting each employee a $3,000 wellness stipend to pursue self-improvement hobbies and interests. So he decides to use it to get in shape! But when 100% of his stipend is mistakenly allocated to a women’s gym, Charlie is out of luck. That is, until the gym’s owner surprisingly allows him to join, even as a man. But how will he ever fit in?