I'm down in Cincinnati and I think there are a couple more guys in the Cincinnati and Northern Kentucky area. I don't usually have the time to cruise (let alone work on my car) but I don't know about anyone else. I'm not familiar with Columbus but you can usually meet car guys and gals by visiting a local track or going to cars and coffee or cruise-ins at places like Quaker Steak and Lube.
If you or someone organizes a get together in Ohio, I would try to make it but no guarantees lol. You can also check the regional forum to see if there are any events close to you.