Back 10-15 years ago a friend tricked me into trying social dancing (think swing, salsa, tango, etc.) by telling me we were going bowling. They drove so I could not escape. Turns out I like it and since it’s not partnered a lot of people come alone and if you can summon up basic courtesy and respect, many of them will dance with you if you just ask. Different dances have different vibes. Swing is wholesome and a bit retro-nerdy, salsa is more flirty and extroverted, tango is intense and deeply technical. I made thousands of IRL acquaintances and dozens of friends doing this over the years. I never went or continued doing it because of the people, but they sure made it worth going. I never saw myself doing or liking this until I tried it. Now I can’t imagine my life without and I seek it out in every city I travel to. I imagine other hobbies could be similar. You can find group bike rides for various skill levels. Maybe your area has a nature hike club or a mycological society (people who study mushrooms). Poetry slams can be surprisingly cool too. None of this is advertised well, but a great place to look is in the back of an alternative newspaper that covers music and art and stuff like that. Like the back back, just before the weed and escort ads.