Yes, you can OC in Ohio. No guns in any place that serves alcohol.
Ohio law says the following are the legal ways to carry in/on a motor vehicle:
1. In a holster on your person.
2. Unlocked glove box or vehicle console.
3. Unlocked container if the container is in "plain sight" and has a closing mechanism like a zipper or a clasp.
4. A locked container need not be in "plain sight"