Love the username- please tell me it's a Master + Margarita reference
Anecdotally here's what's worked for me:
1. Intramural sports- even if you're not sporty, some leagues have zero barrier to entry (Bowling or sand volleyball 6's). There are usually pickup sports apps as well that you could probably find based on your city (i.e. JustPlay)
2. Volunteering- especially neighborhood / trail cleanup groups that you can find on Instagram or Meetup. These are low commitment and people tend to be friendly. Habitat for Humanity was another one that had lots of young people new to the city.
3. Free Fitness (or any other hobby) Groups- you can find anywhere. November Project, for example is in most cities
