The Rosewood London, a gorgeous heap of marble, was once the stuffy headquarters of an insurance company. Today the 5-star property is a favorite of pop and movie stars (Taylor Swift, Cameron Diaz, and Leonardo DiCaprio among them), and its bar is the center of the action.
Located in Holborn, Scarfes -- named for artist Gerald Scarfe, whose cartoons adorn the walls -- serves up classic cocktails and bottles of bubbly in what feels like a stately library in a baronial mansion. Behind the bar, the sexy guys filling your drinks want to make you feel like a regular. Let 'em. 252 High Holborn, London; ScarfesBar.com