While you're at a table with other players, you can tap one of their avatars to open up an interaction menu.
By tapping the beer icon, you can send a drink to that particular player; or you can opt to buy a round for everyone at your table!
First, select your beverage of choice:
Then decide whether or not you'd like to buy a full round, or just one for the player selected:
Watch as the delicious drinks are served to your fellow player(s)! Doesn't it feel great to share?