Essentially it was just to share information and have casual discussion. the attendees were mostly novices looking to learn more with a few advanced note investors . 

I haven't been to a big meeting in a while because it was content geared towards people VERY new to real estate which then drew attendees that hadn't really done deals.There's a few regular other meetups but aren't necessarily published.

I generally have about 25-40 attendees at my events.  

May I ask how/why seminar attendees are calling your numbers?

being a novice, will attendees take me seriously?

These seminars are taught by extremely good salesmen that probably have never done a real estate deal but rely on naïve attendees for their income. 

Attendees called out various answers, like "experience" "knowledge" "education" "money" etc.

But guess what:  I raised almost $2,000,000 from the other attendees because they were there because they were interested in getting involved financially with the types of deals I was learning to do better.  

# of attendees?

At a conference in Vegas one of the attendees was claiming that they pull MLS data, but that it only works well in the larger markets.