At Loews we had what they called the NesCafe which was powdered coffee drinks by Nestle made with a machine that mixed the powder and hot water. The stuff was garbage, and never sold well. The machine was a nightmare, the powder would clog it constantly requiring the whole machine to be stripped down and cleaned. It was very labor intensive to keep operating. It connected directly to the water supply and one time the water line connection burst creating a nice fountain in our lobby! The only decent thing we sold were frozen drinks like Mochachinos with whipcream and chocolate/caramel syrup. Whenever we staffed it we would sell almost nothing but as soon as we closed it, or the staff person running it went on break someone would want something. It was such a headache! I think Loews replaced all thier NesCafe's with Starbucks maybe?
The best coffe machine ive seen for a theatre is the Green Mountain "K-Cup" machine. This machine also is connected directly to the water supply and keeps a reserve of hot water. They have like 50 or so different flavors of coffee that come in little tiny plastic cups with a built in filter, to brew a cup you select the flavor you want open a little draw and place the "K-cup" in. You place the coffee cup below the spout. The machine punches holes in the plastic K-Cup and runs the hot water through it and one cup of fresh brewed coffee is dispensed below. To clean up you open the drawer and throw away the empty "K-cup". This machine was great! It never malfunctioned, Never needed any serious cleaning, you could sell a huge selection of coffee flavors with NO waste. One cup at a time, EXTREMELY fast! I would reccomend this machine to any theatre looking to add coffee. Every cup id brewed fresh with no waste, ever!