On this edition of The Arts Section, host Gary Zidek takes a ride on the Chicago portions of Route 66. The historic roadway turns 100 this year. Theater critic Jonathan Abarbanel joins Gary to preview the best Chicago theater offerings this summer. Later in the show, Gary visits a west suburban youth theater (with a unique backstory) that’s celebrating its 25th anniversary. And we’ll check out one of the country’s only polished rock museums.