Birdhouse plus church equals Birchhouse

When I was a kid, my neighbors had a "condo" birdhouse. I watched that thing closely. I wondered if birds actually used it, and if so, did they play nice?

As hard as a tried, I never saw any birds go in to the house. Maybe they needed their privacy and waited until the nosy kid left the backyard.

That got me wondering what a whole birdhouse community would look like. Here's the start of one right now.