I have attended a few of the Meetup groups. Most have been very good. The one's that try and sell their business services eg. Workshops, Courses etc. are one's to stay away from, especially when they fail to omit a charge on their 'Meetup Page'. You would think if they are trying to do the 'sales pitch' and generate business, they should pay for the room - as most are in libraries and very reasonable to hire. Very deceptive.