Every year the community of car enthusiasts in Riverside host a big car show called “Show and Go” in the downtown area. They block off the main intersections downtown for the weekend, and the cars are driven in a loop, so if you’re there to view it, you can arrive whenever you like, and park on any side street, and there will be cool vintage cars cruising by, as well as other cars parked along the main streets, with their hoods open – inviting you to look and discuss. The owners are usually hovering nearby, and love to answer questions!
I showed up on the first morning, and only stayed an hour – for the main parade – but there was a LOT I didn’t see. You could definitely spend the whole day just looking at cars!