I've wondered about this and why it feels like it does. I think there is an element of people being more chilled and nice to each other because people are chilled and nice in return (generally) rather than wanting to screw you over at every possible opportunity, sort of a virtuous circle. There is also, for me, the break from reality that should in fact be our reality. The only other place I've been to that made me feel remotely the same was a Buddhist retreat in Scotland but that was a bit lacking in entertainment 🙂