People waited for hours when Shake Shack opened in Chicago. They descended on Eataly in such swarms that the Italian mega market had to shut down to restock. Clearly, there are certain chains that Chicagoans are hungry for. And this is certainly true of Sweetgreen, a DC-based salad chain that just opened its 50th location (and first in Chicago) in River North. Boasting a loyal fan base on both coasts, the pastoral, fast-casual shop is taking its foray into the Midwest seriously, ingratiating itself with local farms, artists and seasonal ingredients. Here are the ways Sweetgreen will freshen up the Downtown dining scene and adopting its own Chicago accent.