NEW HAVEN - Many people once gladly paid to see her grace the stage of "The Rep," Yale's famed Repertory Theater. But for the last six years, Margaret Holloway has had a different sort of audience. Often found on the steps of Willoughby's Coffee House in the downtown arts district, her arena of choice, Holloway seems to be known to nearly everyone. They like her act. The 53-year-old "Shakespeare Lady" does an instant monologue for instant change, from Hamlet to Chaucer. Her favorite is seven lines of Medea's speech to Jason in Euripides' classic story of a woman betrayed. "I...