The play was seen in separate earlier productions Off-Off-Broadway and in Florida.
Patrick Walsh directs the comedy "about Steve and Larry, gay dads with a three-year-old son, who are on the verge of getting married until a weekend getaway in the City of Brotherly Love changes everything," according to Bailiwick. "What starts as a quiet, relaxing vacation takes an unexpected detour, and becomes a wonderful exploration of freedom and fantasy, responsibility and role-playing, using the historical backdrop of Philadelphia and aphorisms of Ben Franklin to navigate the way. Does gay marriage have to be exactly like straight marriage?"
Performances run in rep with The Cousins Grimm through Aug. 23 at Hoover-Leppen Theater, 3656 North Halsted, in Chicago. Opening is July 19.
The cast includes Roger Welp as Larry, Kevin M. Grubb as Steve, Susie Griffith as Mom, Evan Absher as Matthew and Maxwell Burnham as Butt Boy.
Mercurio's plays include Red and Tan Line and Andrew Reaches the Other Side. Designs are by Rebecca Hamlin (set), Terrence Pogge (lights), Paula Consdorf (costumes) and Frank Maraes (media).
For tickets or more information call (773) 883-1090 or (800) 838-3006 or visit bailiwick.org.