If we're going to get more than ~10 people, I can go over there and try to negotiate some sort of food/drink special. If you're planning on attending, could you say so in this thread so I can get an approximate head count.
The only deal they seem to be willing to cut is an all you can eat buffet sort of thing for $7/person. Personally, that seems like a good deal - but I don't think that everyone will want to be forced into participating (I was hoping for some sort of 'half off food with password' sort of deal, but apparently they don't do that).
So let's just show up and have a good time. The food/drinks are fairly cheap (by Cambridge standards) anyways.