Sugar Factory keeps getting sweeter. Popularized by celebs like Drake and the Kardashian clan, the chain that offers Giggles Snickers Milkshakes and cocktails in 60-ounce goblets will open a new Sugar Factory Artisanal Doughnut and Coffee Bar at 1991 Broadway this summer – and it is planning a rollout of more of these stand-alone doughnut-coffee bars.