I feel like ideas like this suffer from the same issue, namely when you have an event that’s generically for lonely people you end up with a bunch of lonely people with an odd vibe. It’s like the Meetup events that are for “meeting people in your 30s”. Just ends up being the kind of event no one really enjoys going to because the people who show up have odd vibes.
In my opinion it’s probably far better to have an app that aims to be an alternative to Meetup but isn’t marketed as being for lonely people. Non-lonely people want to do things too.