Louisville has some great Cuban restaurants. 2nd largest Cuban community outside of S. Florida. I've had some great Cuban meals and mojitos there.
As for car scene, give the Cuban connection,cobbled together 1950's Mercury's with boat motors for engines is probably the car scene. LOL.
I really don't know the car scene, but they appear to have some Cars and Coffee gatherings. I'd start there:
https://www.cqriverside.com/cars-coffee
I guess some people will also mention the Derby. Not really that interesting to me. I have never been.