** The Best Exotic Marigold Hotel Proof that art-house movies can be as clichéd as multiplex fare. A comedy-drama about a group of British retirees at a ramshackle hotel in Jaipur, India, it’s predictable fluff aimed at desperate or undemanding 50+ audiences. Judi Dench, Maggie Smith, Bill Nighy, and Tom Wilkinson almost turn it into something. (124 min., PG-13) (Ty Burr)