We found ourselves in Cleveland for lunch and I quickly pulled out my Yelp app to see the best places around town. The top restaurant close to our location was Slyman's (like everyone mentions below) however, our ride (who is a local) said to go to Karl's or Inn of the Barrister's.
They have a decent selection of interesting sounding sandwiches and burgers. I ordered the California Club and discovered that I do not like avocado on my sandwiches. When mentioned to the server, she offered to bring me something else, but I declined and ate it anyway.
Service was great and I really enjoyed all the fun memorabilia on the walls. If you are flying in to Burke Lakefront Airport, Landmark Aviation will drive and pick you up here. Karl's will call them when you are ready to leave.