I agreed with this until I started doing lots of “go outside” stuff and realized there was a bit of nuance. Decided pretty quickly that I’d keep the dating separate from sports/activities because I really enjoy them and things get weird if you treat it like a dating pool. Now I somehow have to work up the courage to talk to someone without a contrived activity bringing us together.
The hospitable thing is true, kind of happens automatically if you’re new to activities. You’re often pretty bad so being nice is a good way to offer something back to the group while you’re learning. There’s a language barrier where I live that makes relaxed chit-chat with strangers extremely difficult. At the moment I’m just not thinking about it, always seems like things work out if you’re in an environment where you’re meeting lots of people each week.