Washington National Opera is simulcasting some performances to giant screens on the National Mall. But unlike last year, the crowds didn’t appear for this weekend’s offering. “In fact, a quick tally suggested that between 200 and 300 people had chosen to spend the afternoon watching ‘Butterfly’ in the rain. They wore raincoats and huddled around heating lamps. Some sat on grimy patio furniture lugged from home; others shared wet blankets and shivers.”