Years ago and years ago, I had a ceramic shop and I always had tea/coffee and pop. It tarted out as a complimentary cup of coffee but then I had to put a money jar beside the tea and coffee because I was getting so busy that I was making in upwards of 5 pots a day. So it started becoming very expensive, so they could throw whatever money they wanted to in the jar and this way it paid for itself. I know that sounds small but with all the other expenses in a shop, you can't give everything away. Some of your regulars will donate the odd can of coffee...I like everybody's ideas, Chris, your head will be spinning by the end of this thread lol :)