Court rental, group classes, and private coaching all live in one venue but use different resources.

Coach bookings must check both court and coach availability at the same time, which paper schedules cannot do reliably.

Most members play the same slot every week, so one scheduling mistake damages long-term trust.

Rain forces bulk reschedules on outdoor courts and notifying everyone one by one is slow.

A coach gets booked on two courts at once, or the court a coach needs is rented to someone else.

Evening court bookings without deposits are abandoned after other members were turned away.

Courts and coaches are separate resources; each coach is linked to the services they teach.

Members choose court rental, coaching, or a class in LINE and only see slots where both court and coach are free.

Group classes have a capacity per session and show as full automatically.

When rain hits, staff move bookings from the back office and every member gets a LINE message with an acknowledge button.

Open LINE OA > choose type (court / coach / class) > pick date and time > pick court or coach > pay deposit > receive confirmation.

Long coaching courses and regular groups are created in bulk from the back office, locking court and coach for the whole course.

No court or coach conflicts, rain reschedules done in minutes, and reports that show which coaches and courts are under-used.