To me 'Meetup' now is a brand, and when I read that associated with an event, I understand it to mean free-or-almost-free-community-gathering. I can't seem to find anything on the website that might explain if that's changed and now it includes three-digit-cost events too. But I find it confusing when the name is used by organizations for events that don't seem to link to the Meetup site. In this one they call it a MeetUP, so maybe the capitalization is enough of a difference to allow them to use the brand?
I had to dig to figure out that it costs $ 199 (or min. $50) to attend. Waste of time. I the email and burrowed into the links because of the 'Meetup' name and assumed I could afford it.

The email subject line: Enp Notes - MeetUP and Other Social Enterprise Updates
Within message body: We’re very pleased that next week's enp Social Enterprise MeetUp will include representatives from the Ministry to discuss the consultation process, and time for MeetUp participants to have a discussion on this issue.
The links:
http://www.enterprisingnonprofits.ca/meetUP?utm_source=enp+Email+Newsletter+Mailing+List&utm_campaign=c207629c53-Enp_Notes_October_26_2010&utm_medium=email
http://www.gifttool.com/registrar/ShowEventDetails?ID=1670&EID=7068