The #1 mechanic: rebooking at the chair
The single highest-leverage loyalty move in a salon is asking for the next appointment before the customer leaves. Loyalty programs that amplify this — visible streaks, recognition for rebooking, reward for the third rebook — outperform generic "10% off" discount programs by a wide margin.
Loyalty software that integrates with your booking system can reward automatic rebookings. If your booking system does not integrate, run the program on paper or a digital pass and ask the stylist, not the front desk.