Marylebone theatre, LondonTwo couples have a sour reunion in Patrick Marber's production of Nathan Englander's play, updated from his 2011 short story to include events after 7 October Nathan Englander's short story, first published in the New Yorker in 2011, tracks four Jews in a room, bitching. The room is Debbie and Phil's swank Florida kitchen; the other Jews are Debbie's former schoolfriend and her husband, visi…