Those who like a little mystery in their lives—besides wondering whether José Contreras will ever stop giving up runs—might want to make like our photographer and check out District Bar, the River North sports lounge that opened Saturday night with one not-so-well-kept secret: Head toward the bar’s library; locate a blue book by a classic American author; give it a tug; and—abracadabra—the bookshelf gives way to a hidden room just right for your enigma-loving posse. Or grab just about any seat in the bar and catch the game on one of the 42 TVs. Because why Contreras hasn’t been traded might be mystery enough.