Steven Howell is the author of Montreal Essential Guide, a Sutro Media iPhone travel app available at iTunes.com.IF YOU GO WHAT: "Innocence Lost." WHEN: Continues through Sunday, Feb. 24. Most performances are at 8 p.m. Check website for times. WHERE: The Centaur Theatre is at 453 St. Francois Xavier St. in Old Montreal. ADMISSION: Adult tickets cost $47.50. Discounts are available for seniors, those 30 and younger, students and matinees. CONTACT: Call the box office at (514) 288-3161, or visit www.centaurtheatre.com.