Over the weekend, Actors' Equity and Broadway's producers reached an impasse in their ongoing negotiations to keep the lights of the Great White Way turned on. Late Friday night, the union made its final offer, and the bigwigs gave their final answer: Heck, no! Both sides agree on salary and health-care benefits for B'way performers; however, they can't get it together where road-show casts are concerned. Sheesh. If anybody deserves a break, isn't it a chorus boy who's bringing a little razzle-dazzle to Peoria?