Hi, I attended today's session in Dubai with no invitation. Around 200 people were in today with the invitation. After they all signed the list and went in, all others with no invitation - around 30 persons - were allowed to enter to the session. Though our names were not included to the list.
The session was very informative and in friendly atmosphere. We were told about the life in NB, then about what steps you would need to pass in order to get PR - though all this information is available in this forum. Therefore I would not suggest you to visit the session with no invitation.