I heard that they will give you unlimited refills but after you finish your first drink they take away your glass and make you drink out of your hands. The secret would be to learn how to make the perfect cup using both hands opposed to just one. The only downside is that you have to pay extra for the wet wipes at the end of the meal because sometimes your hands get sticky if you were drinking any Coke products. It's actually the best way to be a green company and save money on labor as well. Smart!
Maybe try a cafeteria or Subway
I am guessing if that is your big concern the server is probably not getting a tip
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