Judging by the response to a “one day only” pop-up store Wednesday in Toronto, Shake Shack really needs to think about opening a restaurant in Canada. Hundreds of Torontonians withstood frigid temperatures and stood in line for hours at a Shake Shack that opened at 12:30 p.m. and closed around 6:30 p.m. At one point, the location had over 1,000 people in line, according to an Instagram post from Shake Shack’s CEO Randy Garutti .