When you join your gym on BTWB, you are automatically placed into your gyms squad. You will be able to message your friends at your gym, and easily interact with their workout posts. You can react to a specific post, click on “Like” and then tap the Emoji that you want to give the person. To add a comment on the post, just type a message in the comment field.
As well as automatically being added to your gym's squad, you can also create and name your own squad. You can search for your friends from your gym and add them to your own squad.