Most likely the problem was rents were too high and online competition was driving down sales.

However, you should consider tabletop wargaming and miniatures gaming as well. Axis & Allies miniatures, Fog of War, and similar systems lend themselves to play at facilities.

Clearly, you are also going to be encouraging CCGs and LCGs like Magic, Pokemon, L5R, etc. Hosting a Magic tournament by itself could be a source of revenue.

Going to game companies, particularly groups like Fantasy Flight Games, could also make sense. You can see what they sell and offer to host tournaments or other events. Arkham Horror had a giant following at one point in time, for example.

Smaller game producers like Columbia Games or Academy Games might even be interested in doing live presentations.