When we checked in yesterday at Shake Shack’s winter opening, the 21-degree high had an extremely chilling effect on the burger business. Today’s balmy 35 degrees has been a veritable boon! At 2:30 this afternoon, there were at least ten people in view of the Shack Cam, most wearing long black coats and huddled over (we’re guessing) their double Shackburgers and hot chocolate. We predict a significant uptick in weekend business as temperatures leap into the upper 40s. Neither snow nor rain nor temporary lack of heaters will keep us from Danny Meyer’s summertime dream.