CrossFit btwb is for individuals and gyms alike. Your gym does not have to start utilizing CrossFit btwb before you can. Simply sign-up here.
If you don't belong to a CrossFit affiliate:
Join the "Main Site" gym, which follows the WODs posted on CrossFit.com. Main Site is a public gym; anyone can join it at any time. Feel free to follow the CrossFit.com WODs displayed their, or log results for your own workouts.
If you go to a gym that doesn't use CrossFit btwb:
You can still join that gym on CrossFit btwb. CrossFit btwb contains a list of all affiliated CrossFit gym. Search for your gym during the sign-up process to join it. If you are one of the the first 3 users to join your gym on CrossFit btwb, you will be granted "moderator" status. Moderators can Plan workouts for the gym. Encourage other gym members to join your affiliate on CrossFit btwb, too!
If your affiliate owner decides he/she wants to take over the gym on CrossFit btwb, they can follow these steps to officially claim the gym.