40K despite GW's best efforts is still alive and well. There are several stores that have a regular Player base in the area.
Obviously Games Workshop Store in Hyde park
Eastside games N Cards Milford
The Hobby Shop in Dayton
Epic Loot in Dayton
Art of War in Beachmont
Take your pick
Other stores that carry product and have play areas are:
Nostalgia Ink in Mason
Astonishing Comics in Mason.
Not sure about what other stores still have a following of players.