Bolton Little Theatre’s latest production is “Dinner” by Moira Buffini. As with many of her plays it is concerns a set of apparently sophisticated liberal characters brought together in a room. Slowly however their veneers are stripped away to reveal ugly prejudices and other basic flaws and deceptions. In the case of this play, Lars a bestselling author of self-help books and his wife Paige are holding a small dinner party to celebrate his latest publication. But it soon becomes clear that Paige intends this evening to be an elaborate revenge against a group of people she despises for their hypocrisies. Somehow, the mysterious silent butler is the key, but what is his ultimate role?