The Tennis Club That Ran on WhatsApp

It started the way these things always do — with the best of intentions.

A small tennis club had four courts and about a dozen members. Someone created a WhatsApp group so people could message when they wanted to play. "Anyone up for court 2 on Saturday morning?" Someone would reply, and that was that. Booked.

It worked perfectly. For a while.

Then the club grew

Word got around, and within a year the group had over forty members. The casual little chat had turned into something else entirely.

On any given day, the group looked like this:

"Is court 3 free tomorrow at 5?"
"I think Marco booked it, not sure"
"No I cancelled that"
"Wait, which court?"
"Can someone tell me what's available on Sunday?"
"I booked court 1 on Sunday at 10, didn't I? Or was it 11?"

Multiply that by forty people, seven days a week. The group was getting hundreds of messages a day, and buried somewhere in that mess was the actual information about who had booked what.

One person stuck in the middle

The club manager — a volunteer, doing this in her spare time — became the unofficial booking coordinator. Every evening after work, she'd scroll through the day's messages, try to figure out what had been booked, and update a shared spreadsheet that nobody ever checked.

When there was a conflict — and there were conflicts every week — she'd have to mediate. "Actually, if you scroll up, Pedro booked that slot on Tuesday." Then Pedro would say he'd cancelled. Then someone else would say they didn't see the cancellation. And round and round it went.

She once told us she spent more time managing the WhatsApp group than she spent actually playing tennis.

The members who quietly disappeared

Here's the part that nobody noticed at first. Some members just stopped booking.

They didn't complain. They didn't leave the group. They just stopped engaging. The chat moved too fast, it was too noisy, and they didn't feel like fighting for a slot in a thread of fifty unread messages.

A few of them mentioned it privately. "I just go to the public courts now. Less hassle." These were paying members who liked the club, liked the people, but couldn't deal with the booking process.

The club was losing members not because of its courts, not because of its fees, but because of a group chat.

"We're too small for a real system"

When someone suggested getting actual booking software, the response was immediate: "We're just a small club. We don't need all that. A booking system is for big businesses."

And honestly? If you've only ever seen booking platforms built for hotel chains and enterprise conference rooms, you'd think the same thing. Most of them look like you need a training manual just to get started. Dashboards, analytics, integrations, marketing tools — features a forty-person tennis club will never use.

So they stuck with WhatsApp. Because at least WhatsApp was familiar.

What they actually needed

The thing is, they didn't need a sophisticated platform. They needed something that could answer one question: "What's available, and when?"

That's it. A page where any member could see which courts were free, pick a slot, and book it — without scrolling through a group chat, without texting the manager, and without wondering if someone else had already claimed it.

No spreadsheet to maintain. No messages to decode. No conflicts to resolve.

Less noise, more tennis

That's exactly what we built Is Open At to do. A simple booking page where people can see availability at a glance and book a slot in seconds. No account needed, no app to install, no learning curve.

For a club like this, the manager sets up the four courts once, configures the opening hours, and shares the link. That's the whole setup. Members bookmark the page and book whenever they want — even at midnight when no one's around to reply in a group chat.

When someone cancels, the slot opens back up automatically. No messages, no confusion, no "wait, I thought that was free." And if the slot was popular, the waiting list kicks in and notifies the next person.

The WhatsApp group can go back to what it was always meant to be — a place to chat, not a broken booking system.