There is an online community for Nadsat speaking fans of A Clockwork Orange and Malcolm MacDowell.

There are also boards non-related to A Clockwork Orange, so there is a bit of something for everyone.

Being able to understand Nadsat is not required, all levels (from absolute beginner to an expert) are welcome.

If you enjoy speaking Nadsat then help to build a community of Nadsat speakers by joining the Korova Milk Bar forum.

http://thekorovamilkbar.forumotion.co.uk/