Liz Phair's musical legacy packed Chop Suey last night, as Seattle's indie rock scene turned out to wish Three Imaginary Girls a happy sixth birthday, and Phair's Exile in Guyville a happy fifteenth. In truth, the affair had an insider-ish feel, with a large number of people we recognize from the local music industry, due both to TIG's status as the local Pitchfork and to Exile's status as a cult album. The six bands/artists who......