A league bowler is a subscription. They commit months in advance, they show up in bad weather, and they bring a food and beverage habit with them. If you described that customer to any other business, they would build an entire acquisition program around it.
Start with the people already in the building
The highest-converting recruitment audience is almost never cold. It is your open play regulars — people who already like bowling at your center and have simply never been asked in a structured way.