It seems Bending Spoons is on a shopping spree, it would be interesting to know how they are leveraging the financials for this. In terms of technology prowess they do not seem to be lacking.
Something like geo-specific chatrooms that unlock IRL functionality once you get enough members, and remove it if nobody shows up might be worth a try.
Or maybe most people in the US live in low-density suburbs and won't go to anything because parking/driving is a hassle, idk.
https://www.investors.com/news/the-investors-who-see-plenty-...