There's a great little car museum in Allentown,
http://americaonwheels.org/. They hosted some casual cruises last summer and have some for specific brands (Mini, Beetles, Porsche). I'm trying to work with someone on setting something up since, beginning in June they will have a 100th anniversary of Chevrolet exhibit on display for the rest of the summer. I'll let you guys know how it goes.