SWEENEY TODD: THE DEMON BARBER OF FLEET STREET You may have been at this cannibal’s banquet before. But have you ever had the occasion to attend it on the intimate terms provided by the Tooting Arts Club? The site-specific production of Stephen Sondheim and Hugh Wheeler’s masterly and macabre musical, at the Barrow Street Theater, directed by Bill Buckhurst and much feted in its original London incarnation, places the audience in the very midst of the Victorian-era pie shop run by Mrs. Lovett, the title character’s confederate in the related arts of killing and cuisine. Audiences have the option of eating on set before the show (yes, meat pies will be served), which should give a whole new savor to the idea of dinner theater.