Hire the coolest bar in Mayfair

These aren't just regular bars, they're cool bars. The type of bar you want to go to with a date you're trying to impress or take your mates from out of town to make them think - wow, our friend is pretty cool. How'd they find this place? They must really have their life together. Go on, hire out one of the coolest bars in Mayfair for your next event. Bar keep, your haziest IPA, please!