It can be organized as quickly as you can inform the participants (which makes it a powerful format for priority learning in e.g. aid relief)
Contextualized content can be shared by all
more informal setting
Learning can also happen incidentally thanks to the unknown knowledge that pops up as the course participants start to exchange notes on the course’s study
You can connect across disciplines and corporate/institutional walls
As a participant you need to be able to self-regulate your learning and possibly give yourself a learning goal to achieve.
A great surplus after having gone through a MOOC?
A couple of
To build a durable Community of Practitioners, you could also start a LinkedIn group, which will stand the test of time.