When you treat someone
You find out your coffee found someone
When the gift is accepted, you get a notification. If they want, they can write a few words back. A thank-you from a stranger like that keeps you smiling until evening.
Suspended coffee
Leave a coffee or a dessert at your table. The next person to sit there gets it, and you get their reaction.
A kind gesture that waits at the table after you've gone
Someone sits down here and gets a coffee from a person who was here before. Small moments like this make a venue a place you want to come back to
How to treat someone
Hold your phone to the tag on your table. The venue's room opens with a card for your table
From the venue's menu, with photos and prices. You can leave several, and each next person gets one
The waiter adds the gift to your bill. Once you've paid, it waits for the next person at this table
When you treat someone
When the gift is accepted, you get a notification. If they want, they can write a few words back. A thank-you from a stranger like that keeps you smiling until evening.
When someone treats you
Tap the tag on your table. Accept the gift and the waiter brings it over. Or leave it for the next person, and the chain goes on.

Coffee shop
A morning cappuccino for the person who comes in after you on their way to work

Coworking
A coffee for whoever sits down to work at your desk in the afternoon

Restaurant or bookshop
A dessert with tea for the next person at this table
There are a dozen venues on your usual routes. The one you want to come back to is where a stranger once treated you, or where you got a thank-you for your coffee.