Performing in a Broadway show is a grueling commitment. It’s eight shows a week, nine months out of the year, and that requires stamina and talent. Singer-actress Faith Prince knows this well. She’s done it.“It’s a rare beast that can do that and really do it well. If you can do Broadway, you can do anything,” said Prince, who is best known for her Tony Award-winning role as Miss Adelaide in “Guys and Dolls.”Prince will share her insights and talent when she performs Oct.