There are definitely places now within Brooklyn that do it with an intent of creating a sense of neighborliness and community, as well as many that still do it just because that's what people have always done on their block.

My block and many of the surrounding ones in the neighborhood have block associations that organize events like block parties, clean ups, stoop sales, holiday events, backyard garden tours, workshops etc, as well as being able to advocate for the block's collective interest as a legal entity.