I know that #Foursquare is not as popular as it used to be and if anything is quite niche these days, though I wonder if there is an appetite for a #Fediverse alternative that used #OpenStreetMap for venue data
Mastodon is the best way to keep up with what's happening.
Follow anyone across the fediverse and see it all in chronological order. No algorithms, ads, or clickbait in sight.