Users can buy a drink for any friend at any bar. Users also can receive drinks from friends. To buy a drink, a user navigates to a "buy" screen, then selects the friend and the bar. The user then has the option to add a short video, and can use apple pay (or debit card) to send the drink. The recipient is then notified via app, text, or email that she just received a drink.
When a user receives a drink, (s)he receives an alert, which links her to the "redeem" screen". The user can then watch the video, check out the bar (view it on foursquare), and can redeem the drink when she is at the bar (location based), which will transfer the drink amount (i.e. $10) to her account. She can also respond with a short video or pass the drink on to another friend. When she views or redeems the drink, the giver is notified.
In the first stage, users still have to pay through traditional means at the bar. Receiving and sending drinks happens in the app, and users can cash out their redeemed drinks from the app at any time, which will credit their debit card.