There are a few of us around and glad to see you in an 8. Although as a group we have yet to meet exclusively as RX8 owners. Some of us participate in various meets that are open to other cars or get involved with a car club.
There is a Louisville area Mazda club called 'Mid West Mazda Club' and you look them up on Facebook. They have activities you might be interested in but mostly 3s and miatas.
I get involved in Solo (autocrossing) with the SCCA. Our Louisville area has a large group of folks (60-80 per event) with every kind of car out there. Youtube 'autocross' to see what that is about.
Some of the more active locals have been posting on another thread " Anyone from KY?
" Check it out.