I have a local newspaper subscription that often have articles/info and/or ads for local shows and festivals - one can even go to the library to read it every day for free if paying isn’t in one’s budget (but I like paying for it, it’s a lot of fluff but sometimes they dig up something about how my city is being managed or mismanaged, and they have shone a light on a few desperately needed changes in local government).
I also know most venues in the area that host small bands and can check their website or get their newsletter through email.
There’s also flyers being taped up at the store, library and on maintenance boxes and poles around town for current events and activities (that’s how I found my knitting club!).
There are probably ticket vendors where you can flag certain bands or venues or maybe genres and get an email when something is booked in your area.
Just walking my city, talking to people, looking in shops and venues, and being present outside I get a ton of info about local events. I don’t miss FB. I don’t need a global mega-site to tell me what’s happening outside my own door.
Well… YOU could read papers. YOU could look up from your phone and notice the flyers.
The possibilities are there. There are other ways to get info about local events than from fb. You don’t have to wait for everyone else to pick up a paper.
Ps. I have plenty of friends and involvement, which most of my current social circle I gathered after moving alone to a new city, without using social media. I lost a lot of acquaintances by leaving fb, but none that I actually miss. My friends are the ones I put effort into keeping in touch with.
People exist offline. We’ve done so for millennia, and still do.