Let's do the numbers. A pound of coffee is, call it $6 wholesale. From that pound of coffee you can make 256 cups of coffee - while understanding that a grande is two and a venti is three. So call them shots and figure most shops sell doubles. That's 128 servings at, call it, $3 per serving.

Your expenses on the beans are in the noise.

How 'bout the pastries? Let's say you sell scones for $2. Your baker is likely selling them to you for $15 for 2 dozen. You're at 50% profit on shit you didn't even make.

How 'bout the labor? Say you've got 2 baristas. They're making minimum wage - and tips. Tips aren't your problem. So you're into it for $20 an hour including all the FICA and shit.

Rent? Let's say you've got 500 square feet. Let's say you're in a major city but not in a hot spot. You're paying $1000 a month, round numbers. You're open 6am to 10pm, 7 days a week. You're paying basically $2 an hour for your rent.

Your overhead is less than $22 an hour, beyotch. And your profit on your main product is essentially 100%. If you sell 8 lattes at $3 every hour you're profitable. Averaged out over the day, that's a latte every 7 minutes. And yeah, there's a lot of slop in the equation and you likely won't sell as many at 4pm as you do at 8am but you're damn skippy you're making your rent if you're halfway clued in.