The truth is that despite decades of trying, the secular regular get-together groups for people without any unifying interests or socioeconomic status have utterly failed.
For most people, church is the only place they're going to be exposed to others that may share absolutely no interests with them and be of widely different socioeconomic status and yet still be acquaintances.
Our neighborhoods are segregated by socioeconomic class and increasingly, by profession. Our 'clubs' are non-existent, and where they do exist, cater to special interests and hobbies.
We need something that works, not something that is perfect. I still maintain that church, temple, mosque, etc is the best thing.