Barts

Name: Barts
Address: Chelsea Cloisters, 87 Sloane Avenue, London, SW33DW, GB
Telephone: +442075813355
Price range: ££
Rating: 4.7

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London's worst kept secret and first speakeasy cocktail bar, hidden somewhere on Sloane Avenue. Pssst… Become part of London’s worst kept secret!
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Somewhere on Sloane Avenue lies Barts, one of London’s first late-night speakeasy bars. Set in the 1920’s prohibition era as the private apartment of the elusive Uncle Barts, friends and associates are invited to join in the bootlegging activities operated by his gangsters. Sneak into the apartment through the black door to gain access to illicit cocktails and top secret shindigs, where you can also smuggle drinks into the Secret Garden to evade the cops! Visit our shady associates for secret trysts and covert merrymaking at Barts.

31/10/2026

Some secrets are better left buried… but a Halloween party at Barts isn’t one of them. 🕸️🍸

Behind our unassuming doors, the cocktails are flowing, the DJ is spinning and a little mischief is always on the cards.

Happy Halloween from London’s worst-kept secret. 🎃🥂

30/10/2026

Hidden behind an unassuming door, Barts is the speakeasy where expertly crafted cocktails meet lively DJ nights and the occasional bit of rule-breaking.

09/10/2026

Enter the mysterious world of Uncle Barts until early hours of the morning✨ Located somewhere in the Chelsea Cloisters, join us for an illicit tipple or two at our famous late-night parties, featuring live DJs🍸🔑

07/10/2026

It appears Uncle Barts’ family have been sending a few things his way… 📦🍸

First came a rather fine delivery of Italian coffee from Cousin Ugo. Naturally, it wasn’t long before the rest of the family got involved.

From France, Nephew Clement sent 🇫🇷
Niece Steffania contributed from Italy 🇮🇹
Twins Santiago & Luna sent Silver & PATRÓN XO from Mexico 🇲🇽
And Grandad Jock made sure Scotland was represented with 12 Year Old 🏴󠁧󠁢󠁳󠁣󠁴󠁿

Uncle Barts has put their contributions to very good use, creating four Espresso Martinis inspired by four rather spirited corners of the family.

The relatives may be scattered across the globe, but there’s always something that brings the family back together.

Usually, it’s a drink. 🥃🌍

Discover Uncle Barts’ latest Espresso Martini collection at Barts. 🍸

03/10/2026

Memorise this now, will be deleted later! 🚨🕵️‍♀️🍸

25/09/2026

From 11pm, the dancefloor takes centre stage at Barts. ✨
Live DJs spin house, funk, ’80s classics and feel-good beats while our Master Mixologists serve up vintage speakeasy cocktails infused with the forbidden flavours of the 1920s.

One rule remains… a secret password is required to enter this covert celebration. 🔑

19/09/2026

International relations are rather important to Uncle Barts. 🥃🌍

So, ahead of his latest gathering of great minds, he’s been strengthening family ties the only way he knows how… over a very good drink.

Inspired by a rather special delivery of Italian coffee from Cousin Ugo, Uncle Barts has created a collection of Espresso Martinis, each with a taste of home.

🇫🇷 GREY GOOSE® Vodka for Nephew Clement
🇮🇹 Borghetti for Niece Steffania
🇲🇽 Patrón Tequila Silver & PATRÓN XO for twins Santiago & Luna
🏴󠁧󠁢󠁳󠁣󠁴󠁿 12 Year Old for Grandad Jock

Four relatives. Four nations. One family affair.

Consider yourself invited to Uncle Barts’ latest diplomatic gathering. 🍸

17/09/2026

Why Barts? Scroll and find out 🗝️

11/09/2026

Step back in time to the 1929 Prohibition era in one of London’s first speakeasy bars, disguised as the apartment of the prolific Chicago gangster, ‘Uncle Barts’!

📍 Inside Chelsea Cloisters, Barts

05/09/2026

You’ve just found Chelsea’s hidden speakeasy that turns into a nightclub after dark. 🍸🪩

Address

Chelsea Cloisters, 87 Sloane Avenue
London
SW33DW

Telephone

+442075813355

Website

http://www.barts-london.com/

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