Rising from the post-earthquake piles of its crumbled-brick legacy, the Fenix Underground dusted off its ruffled past after investing almost two years -- and more than $4 million -- to emerge as one of the most successful club rebirths in Seattle nightlife history. After extensively renovating the 1909 Buttnick Building at First Avenue South and South Washington Street, the Fenix settled into one of the largest Pioneer Square locales around, spreading 18,500 square feet across three floors -- enough space to squeeze in 1,200 partyers. Three dance floors, a pool hall and even a late-night Tex-Mex-infused cafe with an outdoor patio, fill the massiveness with what seems like an all-encompassing theme park of club goodies.