A members club, but not as you know it. For starters the joining fee is only £12 (pennies compared to the likes of Soho House) and you get your own code for the door, as well as a gold keyring for placing orders when you're taking advantage of their late license.
There's a late-'50s and '60s look to the design here but the drinks – mostly cocktails – are modern, and served until the wee hours (nights finish at 4am). It's dinky too, so it should have an intimate vibe.
Keystone is open Wednesday to Saturday.