I like the idea of fee waivers if people buy a certain amount of store product. Where we used to play WH40K there was a 2 or 3 dollar per person table fee, but if you bought something from the store, that fee was waived for the day. I forget what the dollar amount was to qualify for the waiver but I almost always bought something when I went there, like a box of 'nids, an RPG supplement, painting supplies, or a board/card game. I always figured, so long as I was going to be spending the money I may as well get something to take home after game.
