How to Buy Drinks in Rounds

The word shambles is a disorganized mess or chaotic environment. It's the sort of thing I might say if I've gained some money, like at the end of a comedy show,. You might say, ah, quids in when someone hands you some cash that's been collected at the door. So what about in your country? Do you buy drinks in rounds? I expect that you get a bill at the end, right? Rather than having to keep going back to the bar in order to order more drinks, right? Do you do it that way? What do you do? The drinks are given to you. You hand over the cash, you're done. You bring