the Shattuck as the Disease's terminal ward
there’s almost always one or two guys in the Shattuck who Gately knows personally, from his days of addiction and B&E, from before he got to the no-choice point and surrendered his will to staying straight at any cost. These guys are always 25–30 and look 45–60 and are a better ad for sobriety at any cost than any ad agency could come up with.
Context
The bottom made a daily sight, and the theme's bleakest argument for sobriety. The Shattuck is one relapse downhill from Ennet House — the Disease's terminal ward, where Gately keeps meeting men he used with, now "25-30 and look 45-60," the aging accelerated into ruin. The line "a better ad for sobriety at any cost than any ad agency could come up with" lands the theme's whole case negatively: no argument or slogan persuades like the unsponsored sight of where the Disease ends, the living demonstration of the alternative to "surrender[ing] your will to staying straight at any cost." Recovery is motivated less by hope than by this exhibit.