A reminder that Facebook and booze are inseparable buddies, Drinki is an app that all bar crawl / stag-do planners should be installing onto their phones, ASAP. The British start-up offers a cocktail everyday in exchange for a simple check-in at bars taking part in the app's promotion – something that everyone's zealous "I only get let out once a month to see my pals" mate probably does for you every time you meet, anyway.
So far partnered with 70 London bars (including Buddha Bar, The Big Chill and The London Grind, all presented on a handy map), Drinki lets users claim one drink every day of the week. All you need to do is present the app at a participating bar, with the barkeep then authenticating the app, checking you in on Facebook, and handing over your umbrella-topped beverage. The average cocktail on offer is worth £8, and once the app is downloaded, you'll then be offered a host of other boozy offers, too.