I'm a new caterer and I'd love some help in determining the cost and amount of a coffee service for a buffet. I'm catering a buffet for a bar mitzvah luncheon for about 160 people. At least 100 of the guest are 16 or older. In addition to coffee, there will be tea, iced tea, water and lemonade available. I'm assuming that not all of the 100 guest who may drink coffee will do so. Any thoughts on how many I should plan for? And how do I price the coffee service? I know the cost per pound of coffee, cream and the other items that go along with it. Triple the cost of coffee and other items? Thanks so much!