Here are a few suggestions:
Volunteer at a soup kitchen or a food pantry
Sign up for a church email newsletter and go there when they are doing pot-luck meals (bring a dish to pass)
If you are into sports, sign up to volunteer as a coach.
Don’t buy all of your groceries all at one time. Buy a few things each time and go more often. Even if you don’t meet or talk to anyone but the workers, you will be around other people.
While OP’s post is not the sort of thing we normally see here, the sidebar does say “Anything and everything goes. Memes, Jokes, Vents and Banter.”