Hey Will. You are welcome to come to the meeting tonight and socialize, but you don't need to. There are typically 10-20 of us from the club that attend. You should definitely come to the autocross and see what it is all about, even if you don't race. People are very friendly and most are willing to give rides in their car.
What kind of car do you have? I have raced a lot of odd cars in the past...Crown Victorias, a Saturn SL2, a $1,200 CRX. If you are 25 or older you can always rent a car