Katherine Moennig and Sarah Shahi in season three. ©Showtime Networks Inc./Courtesy Everett Collection Caitlin Copple Masingill, 36, Boise, founder and president, Full Swing PR “The L Word was huge in my own coming-out process. I binge-watched the series in my apartment in Sun Valley, Idaho, where I worked as a cocktail waitress for a year. I…