And speaking of wealthy, scary people, who should arrive but [Harvey] Weinstein himself. "Mr Weinstein, Hadley Freeman from the Guardian. What would you say are the essential ingredients of a good party?" I cry out like a drowning woman. Weinstein walks over to me and – slightly menacingly, one might say – takes my elbow. "Hadley," he says, his voice heavy with condescension, "enjoy yourself." The two men next to him laugh obediently. I decide to follow big Harvey's instructions. And so, with a final glimpse at the dancefloor, where Jessie J is dancing with one friend to Prince's Kiss, I take my leave and go home.