The most surefire way to achieve that is to move into a large, new housing project, but these are rare nowadays and usually work-related.
My grandparents moved in their early 20s from their village to a whole damn city district built specifically to accommodate workers(along with their families) employed in a newly built steel mill.
Everyone was roughly the same age and had children at the same time.
To this day I think it's the single thing communism got right.
I spent the first years of my life living in an apartment complex for university employees, because that was my father's line of work back then.
When my wife and I had our second kid, we moved into a new small (28 indentical homes) housing development (in the US). The builder had owned the land for a long time and bought it for a very low price, so he priced the houses below market value. The school system had recently been highly touted. Everyone who bought a house had a young kid or was about to have kids, valued education, and had similar interests. We all bonded and had great block parties and other shared events as our children grew up. But like you mentioned, these types of experiences are rare.
The most surefire way to achieve that is to move into a large, new housing project, but these are rare nowadays and usually work-related.
My grandparents moved in their early 20s from their village to a whole damn city district built specifically to accommodate workers(along with their families) employed in a newly built steel mill.
Everyone was roughly the same age and had children at the same time.
To this day I think it's the single thing communism got right.
I spent the first years of my life living in an apartment complex for university employees, because that was my father's line of work back then.