The hardest part of a loyalty program is not choosing the reward or configuring the software. It is the first two hundred members. Below that, nothing you do with the data works, because there is no data.
Here is what moves enrolment, in rough order of effect.
1. Staff asking is worth more than everything else combined
A sign gets noticed by a small fraction of customers. A person asking gets a yes from most of them. One sentence at the point of payment is the entire tactic:
"Are you on our loyalty card? It's a free coffee after nine — takes about twenty seconds."
Name the reward and name the time cost. Both objections handled before they are raised.
2. Put the code where people are already waiting
People scan things when their hands are free and their attention is idle. That means the till while the card machine thinks, the table, the queue barrier, the back of the receipt. It does not mean the door, where everyone is walking.
3. Ask for less
Every field costs you sign-ups. A name and one contact method is enough to run a program. Birthday, postcode and preferences can be collected later, from people who have already said yes. If your join form has six fields, that is probably your enrolment problem.
4. Make the first reward visible and close
"A free coffee after nine visits" beats "earn points towards rewards" every time, because one is a picture and the other is a policy. If you can give a small welcome reward on the spot, enrolment jumps — the program has already paid them something.
5. Give staff a reason to care
Staff decide whether your program works. If asking is invisible extra effort, it stops within a fortnight. Show the weekly sign-up count on a board, or tie a small team reward to it. Attribution per staff member makes this easy and mildly competitive.
6. Use the moment they are happiest
Ask after a good experience, not before. The best moment is immediately after you have handed someone something they wanted.
7. Put it everywhere you already speak
Instagram bio, Google Business profile, email footer, the printed menu, the delivery bag. The QR costs nothing to reproduce.
What to expect
A busy café asking consistently will sign up a meaningful share of regulars within the first month. Relying on a sign alone, that same month will produce a trickle. The difference is almost entirely whether anyone is asking.
Once you are past a couple of hundred members, the program starts working on its own: win-backs have an audience, patterns become visible, and the reward starts pulling people back without you.