Beth and David Hertzler believe that, and they believe their customers at the Shoofly Dairy Bar in Williamsburg agree. 2 p. Metropolitan Opera Will Call Window But unlike Blue — who seemed destined for the opera stage at age 4 — Tanner resisted the siren’s call until he was 30. old suspect trying to avoid arrest leapt out an apartment window and electrocu. The plans call for a new audio-visual…