There's one table that serves no foreseeable purpose. The one where a guy's sitting by himself drinking.
Why not add a drinking game on his table? You can select your own team. If they win the battle, they all have to take a drink. Then they fight another team slightly drunk, and their stats are all screwy. They continue on until they're too drunk to win and the prizes get better with each victory. Make it cost energy so people don't abuse it.
Or maybe another idea?