Purring sensually with a slight nasal New York accent, dressed in a black suit, white shirt and a black tie and handling a microphone while in front of its stand, actor Ronnie Marmo vocally and physically conjures up the presence of that monumental performer in his imaginative self-written solo show, “I’m Not a Comedian…I’m Lenny Bruce.” The rascally Mr. Marmo’s haunted facial features, wild eyes and styled dark hair all evoke an accurate resemblance.