To check out if your Gym is on CrossFit btwb, you will need to sign into the website. After signing in, select the "Explore" tab at the top of the page and select "Gyms" from the drop down. You will then be able to search by the gym name or the location of your gym. You will not be able to join your gym from this page.  For step by step instructions on how to join your gym, go to the FAQ article "How do I join my affiliate gym."