I noticed a Hispanic restaurant that I passed was closed. There was a sign (in Spanish) that presumably explained why they were closed. My Spanish is rudimentary at best, but I got the gist of it, and this was before I became aware of Day Without Immigrants.
I heard on the radio that a number of fancy restaurants in Manhattan were closed. I don’t think only Hispanics participated, since Trump offends all sorts of immigrants. A while ago, a lot of Yemeni bodega owners shut down to protest Trump’s executive order.