Big-hearted show has Mercury Theater bursting at the seams
Many an experienced New York producer has taken a look at the Mercury Theater, located in the heart of Chicago's Southport Avenue corridor but bereft of fly space and wing space, and declared it fit only for cabarets and diminutive revues. L. Walter Stearns, who owns, operates and directs at the joint, hasn't listened and just poured new money into the sound system. The result is the thrilling wall of harmonic sound …