OpenStreetMap has at least some of the data: https://www.openstreetmap.org/#map=19/40.67540/-73.95641

so an interface could be made to present it better: without being zoomed in so much, with filters and so on.

I know of https://www.toiletmap.org.uk/ which does this for public toilets.

I just found this which has an example for restaurants in one town: http://umap.openstreetmap.fr/en/map/where-to-eat-in-middlebu...

I love OSM and use it all the time for hiking, but even though their restaurant and hotel listings have good coverage, they're sadly not much use to me without the reviews.

Short of scraping reviews from Google and importing them into OSM for the area in which I'm traveling, I'm not sure there is a good short-term solution.