No "Other Mazda" category? That's where it usually falls at Mazda events with the old RX3s, 1g & 2g MX6s, MX3s, 323s etc etc. I've seen some serious RX3s at past Mazdapaloozas.
Keep me up to date, I'm interested in attending if it's a car fit for the event, but if it's more of a protege/3...