This document proposes applying game mechanics to cafes to increase customer engagement. It discusses the MDA framework of game design, including mechanics, dynamics, and aesthetics. For cafes, some common mechanics are point systems where customers earn coupons or mileage for purchases that can be redeemed for free items. The document suggests two new mechanics: 1) A lottery where customers can voluntarily enter coupons for a chance to win free coffee, and 2) A membership level system where purchasing more provides better discounts and benefits. The goal is to use mechanics to encourage more frequent visits and purchases.