The Rotor Router is organized by the RX-8 owners and those who plan to buy the RX-8 and those who are interested in the RX-8.
This club was started by guys who participated in the first RX-8 meeting in Japan.
The rotary Japan(http://www.rotaryjapan.com/
) is one of the most biggest owners club in Japan for all the rotary owners including RX-7/RX-8/Cosmo etc.
Maybe some of the RX-8 owners are joining in both clubs.