There is Cars And Coffee in Indianapolis. . . which is only an hour away. Happens every Saturday!
Is it worth it? Well, that depends because when I went there were some really cool guys, and some assholes. Overall though, it is worth it. There was a guy in the Ford GT, really really cool! Also sorry for the talking, my friend was not used to loud cars(he is not a car guy, I dragged him with).
NEXT! Purdue is having a car show on April the 14th. What will be there? I don't know. It should be good. And since you are in the Lafayette area it's not to far of a drive. Here is the flyer. It is free. If you don't know how to get there, I will explain. Directions are from State Street!