I always stop by Argo Tea when visiting Evanston. And I usually have at least two large Yerba Mate Lattes with almond milk before I leave! Unique taste and such a pleasant place. It’s pretty small, but there are a couple small tables for 2 people or 1 studier, and a bar along one of the windows.
The food doesn’t quite match up to the tea, though…so plan to eat elsewhere.