Nobu Bar and Terrace

You're walking into the kind of bar where the bartender knows what they're doing—properly dressed, genuinely interested in what you want to drink, and not trying to sell you a £25 nonsense concoction with dry ice. Nobu's ground-floor bar at the Portman Square hotel feels like the grown-up version of Marylebone nightlife, all clean lines and Japanese minimalism without the stuffiness. The terrace is genuinely lovely if you time it right; it's tucked away enough that you won't feel like you're part of some hotel tourist parade. Expect exceptional cocktails that respect the Japanese-Peruvian fusion concept—think sake-based drinks and ceviches—with pricing that's expensive but justified.