**21 intrigues with a fascinating true story, fast pace, and fun characters.** 21 entertains with its fast-paced story based on the real-life account of the MIT Blackjack Team, who tried their hand at counting cards in Vegas and won big. While 21 is not groundbreaking in its storytelling or execution, it's a fun and enjoyable film with a good twist and likable characters. This film sets itself apart from a typical heist movie in that card counting is not technically illegal. The characters weren't trying to escape police but casino enforcers with brass knuckles and examples to make. This…