Joshua Pollack is being pushed to the brink. The Denver restaurateur, who started Rosenberg’s Bagels & Delicatessen in 2012 and grew it to four Front Range locations specializing in New York City-style bagels, is closed this week at two spots because of a COVID outbreak amongst his employees. He has COVID, too, as does his wife and two kids. And his Boulder location can only do takeout because the windstorm that propelled the destructive Marshall Fire knocked out the power for two weeks. “Rosenberg’s Bagels might not exist in Colorado next year,” Pollack said.