I don't know how large the Lithuanian community in Chicago is, but when I lived on the South Side in the late 90s there was an amazing Lithuanian restaurant called just "Healthy Food", a weird amalgam of traditional Lithuanian cuisine and hippie wheat germ and molasses-based fare. They also sold amber jewelry, as well as their own swag like "I ♥ Kugelis" T-shirts. Anyone remember that place?
I’d never been there, but there seem to at least be multiple Lithuanian restaurants in the Chicago area. Sadly, while there were literally dozens of Czech restaurants when I was a kid, now there are three.
Chicago has been shrinking for decades and it's tragic. Even in the 90s there were whole blocks on the South Side (I lived in Back of the Yards) that were just abandoned.