Make the joining path answer real questions
On the club website, state location, activity, likely audience, when people can visit, costs or how to ask about costs, accessibility information and who to contact. Keep joining instructions current and make the action easy to find on a phone.
Ask a person unfamiliar with the club to follow the joining path. Note each point where they have to guess, email and wait, or leave the page to find a price or date. Fix the biggest friction first.