Try a swinging club. Early churches were bordellos before becoming pedophile clubs.

If you like a bit more structure, try a Unitarian Universalist congregation. Mine is 50% humanist with the rest a mix of atheist, agnostic, Jewish and Christian.

I've attended Sunday Assembly. They host events for exchanging ideas, meditation, etc. However, I suspect the bonding is even close to what they have say at a church. After all, most of us by nature are skeptical

The group was nice and educational. However, most them were not close to my age. I wish I could find a group that is closer to my age.

They're fun, and varied. A great deal of different opinions, and interesting people.

I would never do a church like meetup, that sounds horrifying. There are meetups for non believers and skeptics in my area. We go to breakfast, or lunch, some members host potlucks in their homes. The people are interesting, and the conversations are engaging. I'm enjoying them and meeting new people.

We have an informal group that meets in our livingroom. It's more like a 19th century salon I suppose, a gathering to talk about whatever new ideas are on people's minds.

There definitely are! Check out meetups for your area. Check out SundayAssembly.com, or another I've recently heard of is Oasis Network at peoplearemoreimportant.org. Good luck!

They have not the courage to speak out loudly and without upset in a way that people will listen to.

There are folks who just want come for the drinks. There are a few who only want to argue or attack anything vaguely religious. There'll be one young woman acting a fool. There will be one young man acting sad/paranoid/nervous. It will be loud. Too many will be smoking.
They tip well.

My local atheist meetup is heavy on old white guys who want to argue about stuff. But also includes some 30-something folks who have become very good friends. Often, a casual meet up is planned with a book or question or topic to get the conversation rolling.

A couple of my friends went to a non-religious “church” service, held in an actual church. They found it weird. They sang pop songs and there was some kind of “sermon” but I don’t remember what about.