One of the attendees, Carmilla07, has identifed the hotel where the Seminar was held, located about 2 miles away from the Van Nuys park in Sherman Oaks where the pamphlets were distributed.
It was called Sportsman Lodge. We met across the pool in the Terrace Room.
Sportsmen's Lodge Hotel
12825 Ventura Blvd, Studio City (LA), CA 91604
Here is the main website for the hotel: http://www.slhotel.com
Although this thumbnail from the website is very small, it does seem to match the conference room where the Seminar was held:
Topanga State Park is also not too far away. Some have speculated that TCC might stand for Topanga Canyon Ca.
Refering to TCC Topanga Canyon is kind of in the area. That's where I went hiking after the seminar yesterday.