On Lusk Alley in San Francisco's South of Market district, a 1917 smokehouse and meat-processing facility has been renovated to become Twenty Five Lusk.  The 265-seat new American restaurant and bar is an unexpected gem in the urban fabric.  CCS Architecture crafted the two-level space, weaving graceful forms and sophisticated materials through the massive, historic, warehouse structure.  The interior emphasizes a counterpoint between the new palette of polished stainless steel, glass, white plaster, leather, mirror, faux fur, and slate and the existing elements of brick, concrete and rough-sawn timber.