We live in a neighborhood of mostly families in their 30's or 40's... 2 or more kids... dog or cat... bikes in the garage... swingset in backyard, etc. In nice weather moms and dads gather to chat or watch the wee ones play. Someone is always washing their car or shoveling the driveway. Dinners are made for those who just had a baby or are recovering from surgery. We have the "she did what?", "I can't believe that!" gossip... even a couple of neighbors who have gotten a little too close.
It is very rare that someone moves in that does not socialize. Some people may not want to... but we can usually drag them over for a beer or cocktail at some point.
My across the street neighbor just had a baby. They moved in a few years ago... funny story. It happened to be Halloween and the neighborhood party was at the house directly behind them. I am surprised they did not turn around and go back to where they came from. Two of the guys at the party, who happened to be the tallest of the group, decided to get more beer from someone's house. Seeing that the new neighbors were moving in, they stopped to say Hi. One was dressed as white trash and the other as a cow. The cow had a flask in his utter and was asking everyone to suck it. Anyway, this poor couple... little Asian people... were greeted my these two large men, on halloween. We have barely seen them since. They have come out a few times. Once to a New Years party at my house... very quiet, stayed about 5 minutes and left. We would see them leaving for work and coming home. Garage door up... door down. Windows never open... it probably smells in there. One day she went to her mailbox and we noticed she was pregnant. Baby came... neighbors did the neighborly thing and send over a gift... nothing. Now I know some people just like keeping to themselves. But it is weird... what do they do in there? Crack a window... open a blind. Who do they talk to? We are friendly... we only dress like that on special occasions... they must know that. Come out of the house. Say Hellooo.