We started by mapping bars in Milan and writing down what a Spritz actually cost at each one. It turned out other people wanted that list far more than we expected.
So we made it something anyone can contribute to. Users submit prices, flag ones that changed, and suggest bars we've missed. Every submission gets reviewed by a person before it goes live — which is why the data holds up.
Then aperitivo did what aperitivo does: it became social. Now you can follow friends, share where you are, and find your next spot from the people whose taste you already trust.