people like you will drive a coffee shop out of business. That is more likely to be true if the shop is full to capacity (e.g. during the lunch rush, etc.). Wh

people like you will drive a coffee shop out of business. That is more likely to be true if the shop is full to capacity (e.g. during the lunch rush, etc.). When there is free space, your marginal cost to the coffee shop is just electricity, which isn't that much. That said, I agree it's only decent to purchase something regularly -- a coffee every 2 hours or some food seems reasonable to me.