If you are opening a coffee house, you need to do an informal survey on your own. Meaning, all areas are different. Go sit in houses close to you, one comparable to what you are doing, and then one bigger and smaller. That way you have an idea. Otherwise in my opinion, you are wasting your time. You can't judge us, I could tell you I go 3 times a day, but why would you use it? Just travel and take tallies at different times of the day, and figure out an average. That's what we did. We don't even have another house in the area, so I went to other areas, and did an average of them to figure out what to do. Hope it helps!