How Ramen San grew its average check by 19% with sunday

A 19% lift in average check, and what's behind it

A 19% increase in average check doesn’t happen by accident. At Ramen San, it’s largely driven by sunday’s digital menu, which transforms how guests browse and engage with the offering before ordering.

When a menu is visual, well-structured, and easy to navigate, guests discover more. Dishes that might have gone unnoticed on a printed card become visible and appealing. That moment of exploration — unhurried, self-directed, with photos and descriptions at hand — naturally leads to more complete orders.

By the time guests reach the end of their meal and pay through sunday, the lift has already happened.

80% adoption: the highest in the portfolio

What makes Ramen San’s results particularly striking is the adoption rate behind them. 80% of guests pay through sunday’s QR code, one of the highest rates across the Lettuce Entertain You group.

That level of adoption doesn’t happen without the team being fully bought in. When staff integrate sunday naturally into the service flow, guests follow. At Ramen San, the product has become a core part of how the restaurant runs rather than an add-on sitting alongside the existing process.

The 21% tip rate reflects that same dynamic. When checkout is easy and the experience has been good, tipping is a natural next step rather than an afterthought.

A feedback and marketing engine running quietly in the background

At 80% adoption, sunday touches the vast majority of Ramen San’s tables and that reach compounds across every other metric. The restaurant has collected over 33,000 pieces of guest feedback, with 48% of sunday users leaving an internal review. That’s a continuous signal on what’s working, available in real time without any additional effort from the team.

In parallel, Ramen San has built a database of over 37,000 customer emails in six months — a direct marketing asset that grows with every service and gives the restaurant a way to reach its own guests on its own terms.

Ready to grow your average check like Ramen San?

Discover how sunday helps restaurants increase average spend, drive adoption, and build a stronger connection with their guests. Book a demo or contact our team today.