[DustyPorViva]

I believe Tyhm has suggested something similar dubbed a "hub world" multiple times, but has been shot down.

To be honest, while good in theory, if players come for socialization, they'll get socialization. They don't need a specialized server for this because most of the time sitting in a no-pk zone with lots of friends or other people is just the same. Not only that, but they get to sit on an "active server"(note the quotes), where if they choose to suddenly get up and PK, or do something, they can.

I think what you're looking for, sad to say, is already up on UN. I dunno about skateparks and all that, but they've got all the other stuff, as well as lots of other pointless gadgets just for simple entertainment.

EDIT: Though, I have to say... the difference between Tyhm's idea, and your idea, is that yours could pass off as a server. You're basically describing a simple server with ideas such as housing, skateparks and such. If you really, really want this idea to go through, the best way would be to make the server yourself.