The Curzon is showing The Spirit of ’45. It must be the liberal intelligentsia’s favourite venue. The popcorn is gourmet and the folding seats are deep, thick and blue. After the show, Q&As are hosted with progressive heroes like Ken Loach and Danny Boyle, and the clink of glasses mixes with the sound of animated chatter. Coutts cards are common, free-thinking principles are a must and Petis Chablis is £8.50 a glass. The Curzon is more than a cinema. It’s a statement of identity.