I went to Detroit's Eastern Market this morning and I'd say there was about 50% mask wearing, even though everything is nominally outside (the sheds had all their stall doors open). It was extremely crowded and difficult to maintain any spacing, but some were trying. My vaccinated self was wearing a mask and trying my damnest to maintain some spacing.

But while the Market itself still had all their signage up, they obviously weren't controlling numbers anymore.