The house doesn’t always win in 21

Based loosely on Ben Mezrich’s revealing nonfiction tale Bringing Down the House: The Inside Story of Six MIT Students Who Took Vegas for Millions, 21 stars Kevin Spacey as the real-life professor who organized and trained a group of overachieving math students to count cards and win big at the blackjack tables. Also starring Jim Sturgess, Kate Bosworth and Laurence Fishburne. Rated PG-13. In theaters Friday. For movie listings click here. (Photo credit: Courtesy Columbia Pictures).