The Lounge is rated Safe For Work. If you're about to post something inappropriate for a shared office environment, then don't post it. No ads, no abuse, and no programming questions. Trolling, (political, climate, religious or whatever) will result in your account being removed.
You might look into the NextDoor app. I don't know a lot of details, but it sounds like it was made for exactly what you are wanting. My neighborhood uses it, but it is generally just a localized Facebook to let everyone know when a dog is running loose or someone complaining that cars drive too fast during school bus times. I know the app has a documents section, but our neighborhood isn't organized enough to make use of that.
I've not used wordpress but, probably a step up in capability if that doesn't suffice, is something I have: DotNetNuke[^]
Then, for hosting, there are some hosting providers that sorta specialize in DNN hosting. I am currently using (1 personal, 1 for a religious organization) 3Essentials[^] and DNN4Less[^] that I have no complaints about.