Built a self-serve template for gym/league/studio owners

Built this after seeing how many small recurring-activity businesses (gyms, sports leagues, dance studios, hobby clubs) run sign-ups, payments, and attendance manually on spreadsheets or WhatsApp.

Club Manager is a single HTML file — no build step, no server required to try it — that handles member sign-up, subscriptions, session booking, a small shop, and gives the owner an admin dashboard with revenue analytics and a simple CRM for leads/members.

Try it live (no signup): https://claude.ai/artifact/1NzvyGFAKa1tC14pVUYeNd

On Gumroad if useful: https://arielshimmer6.gumroad.com/l/jtiei

Launching on PH tomorrow too. Would love feedback, especially from anyone who's actually run one of these businesses — what's missing, what's overkill.